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Speaker 1: Get in touch with technology with tech Stuff from how

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Speaker 1: stuff works dot com. Hey there, and welcome to tech Stuff.

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Speaker 1: I'm your host, Jonathan Strickling. I'm an executive producer with

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Speaker 1: How Stuff Works in love all things tech, and when

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Speaker 1: my producer is not being super snarky at me, I

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Speaker 1: like to go back and reflect on the past. So

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Speaker 1: I very rarely get to do it because Tar's got

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Speaker 1: some attitude on her. Let me tell you, but today

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Speaker 1: it's time for another classic episode of tech Stuff, which

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Speaker 1: means it's Friday. Today. We're gonna look at an episode

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Speaker 1: that originally published on October twenty four, two thousand eleven.

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Speaker 1: Chris Pallette and I talked about laser eye surgery. I

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Speaker 1: found it fascinating. Chris turned about eighteen shades of green

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Speaker 1: while we recorded this. It's been a long time since

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Speaker 1: I've seen Mr Pillette, but I remember how green he

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Speaker 1: turned when we talked about the process. I have had

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Speaker 1: laser eye surgery done, and now I'm essentially a super human.

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Speaker 1: I can see through walls and shoot lasers with my eyes. Maybe,

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Speaker 1: I guess we'll find out. Let's listen in on this

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Speaker 1: classic episode today. We're going to talk about laser eye surgery.

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Speaker 1: We've had some people ask us about laser eye surgery

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Speaker 1: and what goes into it and exactly how are lasers

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Speaker 1: used in the process. But I think that's a record

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Speaker 1: for your use of that version of lasers. Yeah, And

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Speaker 1: so we're going to, uh, we're gonna kind of break

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Speaker 1: it down and talk about what goes into a laser

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Speaker 1: eye surgery procedure. And we should also mention I should

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Speaker 1: mention that I am very close to someone who has

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Speaker 1: had laser eye surgery, not right now, not like physically.

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Speaker 1: I was going to my wife. My wife had laser

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Speaker 1: eye surgery, um, and she has been very happily moving

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Speaker 1: around without the need for glasses for several years now, um.

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Speaker 1: And it was very impressive to me because my wife

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Speaker 1: is not the the person who typically likes people, uh,

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Speaker 1: you know, messing with eyeballs exactly. Yeah, She's it's not

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Speaker 1: high on our list of things to do today, but

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Speaker 1: she did it anyway. And we're going to kind of

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Speaker 1: talk about the process and what you have to do

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Speaker 1: in order to get laser eye surgery and what's actually

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Speaker 1: being done to you. Yeah. And I think probably the

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Speaker 1: best place to start is speaking of eyeballs with the

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Speaker 1: eyeball itself. Yeah, and why you might need laser eye

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Speaker 1: surgery in the first place. Right, Uh, to to to

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Speaker 1: understand this discussion, you have to have at least a

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Speaker 1: basic geography of the eyeball. So let's talk a little

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Speaker 1: bit about the eye. So, so your your eye. The

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Speaker 1: outer coating is this sort of tough outer coating called

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Speaker 1: the sclera, and that's sort of what keeps the eyeball

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Speaker 1: in its shape. It's it's kind of the the well,

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Speaker 1: it's just it's the outer layer. And then part of

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Speaker 1: this outer layer, about I think one sixth of it

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Speaker 1: is the cornea, which is the clear outer layer that

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Speaker 1: goes or the part of your eye where light actually

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Speaker 1: passes through to get to you know, your eyeball. Right,

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Speaker 1: So the cornea is, uh, it's kind of like a

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Speaker 1: window in a way, or if you want to think

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Speaker 1: of it like a a tablet device or something. It's

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Speaker 1: the gorilla glass. It's on the outside that protects the

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Speaker 1: the the innards. And then behind the cornea, well, first

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Speaker 1: of all, you've got this sort of a watery clear

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Speaker 1: liquid called the aqueous humor. Yeah, this goes back to

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Speaker 1: the old humors. UH idea that dates back centuries where

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Speaker 1: we used to think that our bodies we were like

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Speaker 1: we're governed by a well, a small group of various

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Speaker 1: liquids called humors. We've somewhat developed beyond that at this point,

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Speaker 1: although I do think it's it's funny that even now

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Speaker 1: we are referring to this particular liquid as a humor. Yes,

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Speaker 1: so so the queens humor. It's it's this clear, clear

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Speaker 1: liquid that's behind the cornea. It's also in front of

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Speaker 1: the iris, and there's a little bit behind the iris

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Speaker 1: as well. So then that leads to the question, what

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Speaker 1: then is the iris. Well, that's the that's the color

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Speaker 1: part of your eye. So for example, my iris is

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Speaker 1: blue because it lacks a certain amount of pigmentation which

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Speaker 1: makes it a blue color. My wife's eyes are brown.

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Speaker 1: And uh, this is the part of the other acts

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Speaker 1: is like an adjustable diaphragm around the pupil. So the

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Speaker 1: pupil is the that's the dark center of your iris.

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Speaker 1: That's the little opening actually that allows light to pass through, right,

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Speaker 1: And of course that's the part that the UH enlarges

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Speaker 1: or gets smaller depending on the amount of light in

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Speaker 1: the room. Yeah, it's it's it's really an ingenious kind

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Speaker 1: of approach. Really, it's it's the same sort of thing

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Speaker 1: that we do with cameras when we have an aperture,

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Speaker 1: you know, the aperture of a camera. And you may

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Speaker 1: remember this if you us into our our podcast about

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Speaker 1: slow motion, we talked about the aperture quite a bit. Uh.

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Speaker 1: That's what allows you to adjust how much light comes

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Speaker 1: in through the camera's lens and hits the sensor. Uh,

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Speaker 1: same sort of idea here. The iris is what will

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Speaker 1: expand or contract around the pupil and thus control the

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Speaker 1: amount of light that comes in. So, if you walk

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Speaker 1: into a dark room, then the it's going to the

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Speaker 1: the iris is going to allow more light to pass through.

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Speaker 1: It's gonna allow more of the pupil to be exposed

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Speaker 1: so that you get more light so that you can

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Speaker 1: maneuver through because you know you're gonna be able to

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Speaker 1: you need to be able to see if you're in

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Speaker 1: a really bright environment. In order to protect the eye,

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Speaker 1: the diaphragm is gonna close around the pupil to restrict

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Speaker 1: the amount of light that comes in. Right, And of course,

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Speaker 1: um there there's more than one um analog as far

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Speaker 1: as the eye and a camera. Sure, we were talking

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Speaker 1: about cameras not too long ago, where we we talked

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Speaker 1: about the lens and how light passes through the lens

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Speaker 1: to the film on the other side, or or an

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Speaker 1: image sensor in the case of a digital camera. Well,

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Speaker 1: in the eye, you've got the retina, which is um

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Speaker 1: if you will, on the on the back side of

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Speaker 1: the eye, which is what records the image as as

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Speaker 1: the light comes through the pupil right you've got You've

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Speaker 1: got the pupil, that's the aperture. You also have a

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Speaker 1: lens right behind the pupil, So the lens, the lens

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Speaker 1: is what is focusing that light, directing that light so

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Speaker 1: that it it hits the focal point ideally, which is

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Speaker 1: the retina. And the retina contains certain kinds of cells,

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Speaker 1: rod cells and cone cells. These are light censoring light sensors. Essentially,

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Speaker 1: UM he sells sense the presence of light and UH

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Speaker 1: through a chemical reactions send that information to your brain

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Speaker 1: and then your brain says, hey, I recognize that that's

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Speaker 1: a puppy. Also, at the interesting point, if you weren't

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Speaker 1: familiar with us, UH, the image that you see when

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Speaker 1: you're looking at something. When it hits your retina, it's

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Speaker 1: actually inverted, just as it is in a camera. But yes,

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Speaker 1: that's the So this, this is the basic part of

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Speaker 1: the eye. Now, what happens when something is just not

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Speaker 1: quite right? For example, Uh, Chris, I don't know, are

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Speaker 1: you near sighted or far sighted? I am myopic. I

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Speaker 1: am also myopic. That means we are both near sighted,

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Speaker 1: and since we both have our our glasses off at

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Speaker 1: the moment, we're both a little blurry. So myopia means

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Speaker 1: that the focal point is hitting. Uh, it's it's hitting

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Speaker 1: before it gets to your retina. So inside your eye

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Speaker 1: there's a you know, the light is being directed by

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Speaker 1: the lens to your retina. Uh, those the points of

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Speaker 1: light are all converging, right, and that point of convergence

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Speaker 1: is the focal point. Now, the focal point for those

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Speaker 1: with myopia is in front of the retina. It's not

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Speaker 1: hitting the retina just right. So that means that when

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Speaker 1: we start looking around things, things tend to be the

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Speaker 1: further way things are, the blurrier they tend to be. Yes. Um, Now,

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Speaker 1: this can happen through various uh, just well irregularities. There

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Speaker 1: could be irregularities in the cornea that can cause this

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Speaker 1: to happen, or in the lens itself, or it could

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Speaker 1: be that the eyeball itself is elongated. Yes, so that

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Speaker 1: the you know, if the eyeball was not elongated, the

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Speaker 1: focal point would be right there on the retina where

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Speaker 1: it's supposed to be and everything will be fine, but

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Speaker 1: the eyeball has been stretched. Nice sound effect. Thank you

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Speaker 1: doesn't necessarily doesn't necessarily mean that someone's actually gone in

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Speaker 1: there and stretch your eyeball. It just means that that's

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Speaker 1: kind of the way it developed. Um now far sighting

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Speaker 1: this which is a hyperopia hyperopia, thank you, I'm glad

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Speaker 1: you're ready for that one. Ready, Yeah, hyperopia. You've got

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Speaker 1: the focal point that's that's actually behind the retina, so

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Speaker 1: when the lights hitting hitting the retina, it's not converged

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Speaker 1: on that point like it should be. And U hyperopia,

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Speaker 1: If you're hyper hyperopic, would that be correct? Hyperopic? Then

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Speaker 1: that would mean that, you know, you would the the

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Speaker 1: the closer something is, the more out of focus it is,

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Speaker 1: the further away it is, the clearer it is. Also,

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Speaker 1: in addition to being myopic, I also have an astigmatism,

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Speaker 1: I too have an a stigmatism. I think he's just

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Speaker 1: just you know, doesn't want me to have one more

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Speaker 1: than he does. I only have one. Do you have

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Speaker 1: to well know I'm saying, are you and have an astigmatism?

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Speaker 1: Me too? Me too? Just it happens to anyway, and

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Speaker 1: and an a stigmatism. Um, you have a difference in

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Speaker 1: the shape of your cornea or the lens. And basically

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Speaker 1: what happens is it creates, in effect, two focal points

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Speaker 1: within your eye. Yeah. Um, And so basically that sort

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Speaker 1: of confuses the way the light is travel inside your eye.

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Speaker 1: And that, um, you can have, as we were both

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Speaker 1: pointing out just a moment ago, you can have, uh,

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Speaker 1: a stigmatism on top of another eye condition. Yes. Yeah,

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Speaker 1: it's really an uneven curvature of the cornea or or lens.

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Speaker 1: And yeah, it's it. It can cause problems. So the

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Speaker 1: thing is that the humans are clever and um, yeah,

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Speaker 1: and we figured out a long time ago that if

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Speaker 1: you use a lens of glass and it's curved just

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Speaker 1: the right way, the curvature of the glass can direct

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Speaker 1: light so that it corrects for these problems. I can't

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Speaker 1: imagine the amount of trial and error it took to

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Speaker 1: be able to figure this out. But to correct your

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Speaker 1: your vision you have to, you know, take into account

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Speaker 1: what the focal point is doing, uh, inside your eye.

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Speaker 1: So with it's a little bit different between myopia and

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Speaker 1: and hyperopia. But anyway, the curvature of the lens depends

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Speaker 1: upon the condition, right, you know, if it's gonna be

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Speaker 1: a concave lens for one and a convex lens for

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Speaker 1: the other, And honestly, I can't remember the one from

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Speaker 1: the other. I guess I could stare at my glasses

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Speaker 1: long enough and try and figure it out. But um,

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Speaker 1: but the point being that that's what's going to direct

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Speaker 1: the light the right way into your eye so that

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Speaker 1: it corrects for whatever problem you already have. Chris and

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Speaker 1: I have more to say about laser eye surgery, but

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Speaker 1: first let's take a quick break to thank our sponsor.

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Speaker 1: What if we didn't want to wear glasses, what if

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Speaker 1: we wanted something where it wasn't you know this this

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Speaker 1: pair of frames sitting on our face. Well that's when

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Speaker 1: we started to come up, well, we could maybe make

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Speaker 1: a lens that could sit directly on the eye and

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Speaker 1: do the same sort of correction. It's gonna require a

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Speaker 1: more precise approach because it's going to be a much

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Speaker 1: smaller lens that by definition, I mean, you can't have

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Speaker 1: an enormous lens shoved into your eye and expect any

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Speaker 1: sort of comfort. So, um, well that's where the contact

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Speaker 1: lens idea came from, where we started to kind of

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Speaker 1: get you you apply these same kinds of thought to

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Speaker 1: a thin lens that could fit directly on top of

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Speaker 1: the eye. But then we thought, hey, wait a minute,

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Speaker 1: we're really just talking about lenses here. Even even the

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Speaker 1: cornea can act somewhat as a lens. The cornea on

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Speaker 1: your eye itself directs light. So what if we were

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Speaker 1: to reshape the cornia so that it corrected for whatever

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Speaker 1: problems we had as you know, as far as vision

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Speaker 1: problems are concerned. Uh, what if we just did that,

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Speaker 1: then we wouldn't have to wear contact lenses or glasses

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Speaker 1: or anything. And that's where the idea for corrective surgery

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Speaker 1: comes from. And um, and at its very most basic level,

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Speaker 1: what correct to what this laser eye surgery is doing

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Speaker 1: is it's altering the shape of the cornea so that

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Speaker 1: directs light in a way that corrects for whatever vision

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Speaker 1: problem you have. That's that's the basic you know, when

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Speaker 1: you get down to it, that's what laser eye surgery

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Speaker 1: is all about. So it's just it's that same principle

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Speaker 1: behind grinding the lens so that you can see, you know,

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Speaker 1: in a pair of eyeglasses, but now it's applied directly

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Speaker 1: to our biology. It sadly does not mean you will

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Speaker 1: actually end up with laser shooting out of your eyes,

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Speaker 1: well at least not for most people. No, I would

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Speaker 1: think that's a pretty rare side effect. So, yeah, where

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Speaker 1: would you like to start with laser eye surgery. Well,

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Speaker 1: I was going to talk about sort of the process

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Speaker 1: you have to go through before you get laser eye

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Speaker 1: surgery done, and then we'll get into what is actually

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Speaker 1: going on in a a laser eye surgery session. Yeah,

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Speaker 1: because frankly, it's it's reminds me of a lot of

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Speaker 1: life events. You know. The actual event itself doesn't really

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Speaker 1: take all that long. Laser eye surgery only takes a

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Speaker 1: few minutes. Yeah, it can take less than half an

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Speaker 1: hour total um. But there is quite a bit of

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Speaker 1: preparation that needs that you need to go through beforehand.

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Speaker 1: To make sure that everything goes smoothly, um and preferably

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Speaker 1: not panicky, which is the reason that I haven't had

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Speaker 1: it done. Yeah, So the first thing you have to

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Speaker 1: do is you have to go through and we're talking

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Speaker 1: about a reputable laser eye surgeon. This is a good

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Speaker 1: time for us to point out there are a lot

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Speaker 1: of different facilities out there that offer laser eye surgery services.

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Speaker 1: Do your research. Yes, that's a great idea, because I

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Speaker 1: know for a fact that there are there's a few

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Speaker 1: in Atlanta that have a reputation for being less than honesty,

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Speaker 1: Like they'll the what the they do is they'll offer

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Speaker 1: this amazing sounding deal and of course we all know

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Speaker 1: the phrase it sounds too good to be true. It

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Speaker 1: was probably on the internet. Um, and the deal the

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Speaker 1: deal would be something like two D and I, which

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Speaker 1: is about a tenth of what some eye surgeries cost,

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Speaker 1: you know, and you're thinking, Wow, that's amazing, And then

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Speaker 1: you know it's got an official sounding name and that's

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Speaker 1: gonna be great. And then if you actually start doing

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Speaker 1: some research, you'll see that there's often a lot of

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Speaker 1: bait and switch involved where you'll go in and they'll

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Speaker 1: do this initial I exam, and then they'll say, oh, well,

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Speaker 1: in your case, because you have this particular you know,

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Speaker 1: condition or whatever, it's actually gonna be closer to hundred

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Speaker 1: per eye or and and just that alone is a

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Speaker 1: you know, first of all, that's kind of a shady

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Speaker 1: business practice. But beyond that, you don't want you know,

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Speaker 1: you don't know how far their ethics extend into, say,

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Speaker 1: not being a good doctor. So so in other words,

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Speaker 1: do your research quick alert. So assuming that the the

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Speaker 1: facility has got a good reputation, uh, you go in,

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Speaker 1: you would get a very thorough eye exam, probably more

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Speaker 1: thorough in fact, I would are definitely more thorough than

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Speaker 1: you would get going to just get a pair of

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Speaker 1: glasses or contact lenses. I'm sure yes, because they have

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Speaker 1: to be they have to be very careful. Um, if

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Speaker 1: you're going to go for for lasic, for example, Um,

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Speaker 1: your eyes have to fall within a certain set of parameters,

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Speaker 1: and they can treat myopia, hyperopia and a stigmatism, but

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Speaker 1: it has to be within a certain range. Now, of

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Speaker 1: course that's measured in diopters um. That's that's kind of

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Speaker 1: the degrees of prescription. So you know, if you hear

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Speaker 1: someone say, oh, I've got minus three in this I

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Speaker 1: and minus two point seven five in that I the myopic. Yeah,

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Speaker 1: their myopic. Yeah that a negative number means myopia, a

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Speaker 1: positive number is hyperopia. And then um, a stigmatism can

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Speaker 1: go either way. Yeah. Now, we we do have a

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Speaker 1: great article on how lasic works on the website. UM

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Speaker 1: and according to the research in there, UM, myopia treatable

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Speaker 1: with lasic can be from negative zero point seven five

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Speaker 1: to negative ten, which is that's a big, big range.

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Speaker 1: And and I should also add that depending on which

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Speaker 1: doctor you go to, they may tell you that if

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Speaker 1: your eyesight falls within you know, a certain range, like saying,

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Speaker 1: let's say the negative point seven five to say negative

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Speaker 1: one point five, they might say, you know what, the

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Speaker 1: the experience you're going to have, the the new vision

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Speaker 1: you're going to have, may not be so dramatic as

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Speaker 1: to warrant laser eye surgery. Again, a reputable UH clinic

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Speaker 1: is going to tell you if the the result is

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Speaker 1: going to be truly noticeable or not. For some people

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Speaker 1: it may not be. I for at least years ago,

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Speaker 1: when my wife could have done I was right there

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Speaker 1: on the the border like like you know, I could

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Speaker 1: have gone it done, but it may not have been

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Speaker 1: that dramatic. And when you're talking about that kind of expense,

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Speaker 1: really do you want to go in for that. My wife, however,

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Speaker 1: she had gotten to the point of vision where they

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Speaker 1: no longer use the eye chart. They would say how

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Speaker 1: many fingers am I holding up? So she was an

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Speaker 1: ideal candidate. Well, you have to hold some up. Um,

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Speaker 1: Like whoa, you need some surgery. Hyperopia that they can

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Speaker 1: treat with lace ranges from plus zero point seven five

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Speaker 1: to plus four and then they can treat a stigmatism

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Speaker 1: for plus or minus zero point seven five to plus

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Speaker 1: or minus four um. So that's a pretty a pretty

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Speaker 1: decent range of vision that they can they can correct. Um.

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Speaker 1: They also look at the cornea thickness. It has to

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Speaker 1: be five microns or greater um. That's we'll explain why

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Speaker 1: the cornea has to be at least that thick coming up.

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Speaker 1: And that's going to be the the squiggly squirmy part

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Speaker 1: where we're both like, okay, so here's what happens next.

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Speaker 1: I'll be going out for some water, Chris, Chris might

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Speaker 1: might go bye bye for about for about five minutes.

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Speaker 1: Was that thud? Yeah? But there are other types of

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Speaker 1: laser eye surgery that you can pursue if your cornea

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Speaker 1: is not of that thickness, if it's if it's thinner

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Speaker 1: than that, there are other types of laser eye surgery

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Speaker 1: you can look into, so to speak, right, Um. And

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Speaker 1: then your pupil uh should be no more than six

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Speaker 1: point five millimeters in diameter. Um, although you know there

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Speaker 1: are advances now that allow you to work with up

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Speaker 1: to eight point five um. Also, so if you' have

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Speaker 1: been Diesel from that that movie where he's got those

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Speaker 1: huge corneas, the huge pupils, that just wouldn't work. Lady

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Speaker 1: Gaga from that that one video, Yeah, there you go. Yeah,

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Speaker 1: those those folks, I'm sorry, or practically any Disney character,

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Speaker 1: because I mean, have you seen Tangled. That girl's eyes

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Speaker 1: are huge. Yeah, Sailor Moon is not gonna have it

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Speaker 1: done either. Um. So yeah. And also if you're pregnant,

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Speaker 1: have heart problems, severe heart problems anyway, Um, if you're

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Speaker 1: taking drugs such as medicine for migraines or acne, um,

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Speaker 1: you have a condition called kara to countess, I'm hoping

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Speaker 1: I'm pronouncing it right. I didn't check the pronunciation, but

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Speaker 1: it's a thinning of the cornea condition. And UM, actually

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Speaker 1: I might be Uh, I might not be eligible either

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Speaker 1: because certain conditions like autoimmune diseases one of which I have, UM,

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Speaker 1: vascular disease, different kinds of eye diseases, and diabetes, all

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Speaker 1: these things might prevent you from going through with a

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Speaker 1: lasic procedure. UM. So these are things that the doctor

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Speaker 1: is going to have to talk to you about. UM,

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Speaker 1: and I would encourage history. Yeah, you need to be

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Speaker 1: honest too, because you know, even though you may not

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Speaker 1: want to wear glasses. Uh, you know, this is serious

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Speaker 1: business and you could end up with results that you

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Speaker 1: are not happy with. It can be complications as well.

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Speaker 1: I mean even yes, you know, it could be that

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Speaker 1: everything goes well, but uh, you have some complications during

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Speaker 1: the healing process. And if your medical history means that

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Speaker 1: you can't have certain kinds of drugs to to help

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Speaker 1: that healing process along, that could be an even bigger

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Speaker 1: problem down the road. So yeah, it's very important. And

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Speaker 1: then the actual exam, you're going to be looking through

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Speaker 1: lots of different devices that are going to be measuring

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Speaker 1: how your eyes are receiving light. And there's actually technically

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Speaker 1: mapping out your eyes, the inside of your eyes. Um,

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Speaker 1: there's a thing called a corneal topographer. Yes, that's where

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Speaker 1: they type on your eyes, right, that's a typographer topographer.

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Speaker 1: It actually maps the cornea, so it's it's looking at

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Speaker 1: the actual shape and thickness of the cornea. Um, and

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Speaker 1: it's to uh to really determine exactly how the light

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Speaker 1: is behaving once it hits that part of your eye. Um.

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Speaker 1: There's also the pupilometer, which is another device that's looking

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Speaker 1: specifically at your pupil I mean, there's not a big

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Speaker 1: surprise there, right, you have a student in your eye,

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Speaker 1: all yeah, and then the their software, very powerful software,

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Speaker 1: but working behind the scenes that's mapping out your eye

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Speaker 1: so that the surgeon is going to know exactly what

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Speaker 1: sort of of adjustments they're going to need to make

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Speaker 1: to your cornea in order for it to um to

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Speaker 1: direct light the way you need it to be so

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Speaker 1: that you don't have to wear glasses or contact lenses anymore.

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Speaker 1: So it's it's pretty complex stuff. I mean, it's um,

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Speaker 1: pretty fascinating to see. And also a laser eye surgery

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Speaker 1: procedure often requires two people A surgeon and at well

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Speaker 1: beyond the patient to people to actually to do the

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Speaker 1: procedure the surgeon, and then there's usually a an operator

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Speaker 1: who's working on one of the laser machines. I hate

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Speaker 1: to interrupt while we're strolling down memory lane, but it's

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00:22:54,080 --> 00:22:56,520
Speaker 1: time for us to take another quick break to think

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Speaker 1: our sponsor. Now we've talked about the process where let's

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Speaker 1: say that you've gone through you've had your eye exam,

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Speaker 1: you've done your medical history, and they've determined your what

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Speaker 1: is called an ideal candidate. Now, that does not mean

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Speaker 1: you are the perfect person to have had laser eye surgery.

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Speaker 1: It just means that you fit those parameters that um

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Speaker 1: you don't have anything outlying any of those parameters that

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Speaker 1: would that would cause concern. It appears that it will

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Speaker 1: work out. Yes, Uh, now is the time where you

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Speaker 1: start to um to to actually go through the surgery itself.

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Speaker 1: And I think I think we can walk through the

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Speaker 1: laser process because that's still fairly common. I mean, that's

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Speaker 1: that's actually probably one of the most common forms of

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Speaker 1: laser eye surgery out there. But we'll also talk about

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Speaker 1: how the other kinds are a little different. So um so,

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Speaker 1: first when you arrive to get your laser eye surgery done,

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Speaker 1: one thing that happens fairly frequently is that they offer

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Speaker 1: you something to calm your nerves. Yes, because it turns

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Speaker 1: out when a lot of people, when they're thinking they're

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Speaker 1: going to be laying down on the table with someone

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Speaker 1: shooting laser beams into their eyes, they get a little anxious.

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Speaker 1: I can't imagine why. Actually, that's not the part that

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Speaker 1: makes me anxious. But we'll get into at UM. So

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Speaker 1: you know, it's the part immediately before the laser gets

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Speaker 1: shut to your eye. That would be the part. Yeah,

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Speaker 1: that's the part where it gets I'll score me. Yeah,

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Speaker 1: so and yeah. I mean basically, they're going to set

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Speaker 1: up an appointment when you do your your pre op work.

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Speaker 1: I don't think that they actually would take you back

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Speaker 1: immediately and go all right, you look good, let's go. No, No,

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Speaker 1: it's usually it's usually a day or two between. Speaking

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Speaker 1: from my wife's experience, she went in and had the

427
00:24:39,800 --> 00:24:43,359
Speaker 1: um the work, that the pre up work done, and

428
00:24:43,400 --> 00:24:45,240
Speaker 1: then it was a couple of days later after they

429
00:24:45,240 --> 00:24:47,560
Speaker 1: had a chance to really look at the data and

430
00:24:47,760 --> 00:24:49,960
Speaker 1: they arranged for the time. And you also have to

431
00:24:50,000 --> 00:24:52,960
Speaker 1: go there with someone else to drive you home. Yes,

432
00:24:53,040 --> 00:24:54,960
Speaker 1: because you will not be able to use your eyeballs.

433
00:24:55,119 --> 00:24:57,720
Speaker 1: Yeah for that, Yeah, exactly, You're you're going to have

434
00:24:57,760 --> 00:25:01,800
Speaker 1: some limited eyeball use immediately afterwards. You can't put your

435
00:25:01,800 --> 00:25:05,919
Speaker 1: weight on them exactly. Um, use some eye crutches. So

436
00:25:06,280 --> 00:25:10,480
Speaker 1: I crutches? Um are those apple products? Um? No, it's

437
00:25:10,520 --> 00:25:15,359
Speaker 1: not the lower case I E I see. Um. So

438
00:25:15,760 --> 00:25:18,800
Speaker 1: the next thing they're gonna do, once you're you're sure

439
00:25:18,840 --> 00:25:20,840
Speaker 1: you want to go through this, of course, they also

440
00:25:20,920 --> 00:25:22,680
Speaker 1: make you sign a waiver saying that you understand that

441
00:25:22,720 --> 00:25:25,560
Speaker 1: there are things going on where they're gonna shoot lasers

442
00:25:25,560 --> 00:25:29,239
Speaker 1: in your eyeballs and uh, there are risks involved with that,

443
00:25:29,400 --> 00:25:32,520
Speaker 1: and part of this depends a lot on your cooperation,

444
00:25:32,760 --> 00:25:37,879
Speaker 1: like and and not running from the office screaming. Um again,

445
00:25:38,040 --> 00:25:41,520
Speaker 1: I'm just imagining what would happened with me. They assuming

446
00:25:41,560 --> 00:25:45,600
Speaker 1: your your nerves of steel are holding, are holding, they

447
00:25:45,600 --> 00:25:49,120
Speaker 1: will go ahead and put some topical anesthetic in your eyes. Yes,

448
00:25:49,200 --> 00:25:52,320
Speaker 1: so this is to numb your eyes because they will

449
00:25:52,320 --> 00:25:56,080
Speaker 1: need to touch them and uh. And once you're once

450
00:25:56,119 --> 00:25:58,600
Speaker 1: that started to take effect, you're lead into the upberating

451
00:25:58,720 --> 00:26:01,480
Speaker 1: room where you laid down on a table. It's usually

452
00:26:01,760 --> 00:26:05,720
Speaker 1: a padded table, and they position you so that you're

453
00:26:05,760 --> 00:26:09,840
Speaker 1: going to be under the machine that goes ping and

454
00:26:10,080 --> 00:26:13,879
Speaker 1: uh and and then they have to h while they

455
00:26:13,880 --> 00:26:16,199
Speaker 1: have to secure your eyelids so that you're not going

456
00:26:16,240 --> 00:26:18,719
Speaker 1: to be blinking, yes, because you cannot blink, so they

457
00:26:18,760 --> 00:26:22,359
Speaker 1: may be using usually a combination of things. There's usually

458
00:26:22,440 --> 00:26:25,920
Speaker 1: some sort of tape that's safe to put on your

459
00:26:26,000 --> 00:26:28,879
Speaker 1: your eyelids to keep your eyes open. There's also a

460
00:26:28,880 --> 00:26:32,440
Speaker 1: device that will sit on top of the bottom part

461
00:26:32,440 --> 00:26:36,280
Speaker 1: and top part of your eyelids to keep those them stationary. Um.

462
00:26:36,359 --> 00:26:39,080
Speaker 1: This looks a lot like the device that was used

463
00:26:39,080 --> 00:26:42,760
Speaker 1: in a famous documentary called a clockwork orange. Um. Yeah,

464
00:26:42,760 --> 00:26:44,960
Speaker 1: it's a little freaky if you're looking at someone who's

465
00:26:45,000 --> 00:26:48,240
Speaker 1: getting this done. The eyelids speculum. Yeah. Yeah. It's to

466
00:26:48,520 --> 00:26:50,720
Speaker 1: hold those eyelids in place because of course, if you

467
00:26:50,760 --> 00:26:53,040
Speaker 1: blink when the laser is going, it's gonna totally mess

468
00:26:53,119 --> 00:26:55,560
Speaker 1: up the procedure. So they have to they have to

469
00:26:55,800 --> 00:27:01,200
Speaker 1: uh stabilize and and keep your eyelids from moving. Um.

470
00:27:01,240 --> 00:27:06,600
Speaker 1: And they also put down a ring around your eye

471
00:27:06,640 --> 00:27:09,399
Speaker 1: that that stops you from being able to move your

472
00:27:09,400 --> 00:27:13,800
Speaker 1: eye around. You're you're looking directly up. Are directly straight

473
00:27:13,880 --> 00:27:16,080
Speaker 1: straight ahead is the best way of putting it. Not

474
00:27:16,200 --> 00:27:19,200
Speaker 1: up as in your eyes are turned up, but looking straightforward.

475
00:27:19,520 --> 00:27:21,239
Speaker 1: It's just because you're laying on your back. It just

476
00:27:21,280 --> 00:27:25,880
Speaker 1: happens to be up. And then as they the next

477
00:27:25,920 --> 00:27:30,160
Speaker 1: step is the squiggly part. Are you ready? Okay, So

478
00:27:31,480 --> 00:27:36,280
Speaker 1: they pull out the microcarra tome Yes, see they have to.

479
00:27:36,600 --> 00:27:41,240
Speaker 1: They're gonna put some marks on your cornea to identify

480
00:27:41,359 --> 00:27:44,359
Speaker 1: where it is green, where they're where they're going to

481
00:27:44,560 --> 00:27:49,880
Speaker 1: use the microcarra tome um. Basically, when you're dealing with

482
00:27:50,240 --> 00:27:53,760
Speaker 1: something as sensitive as vision, and you know, the professionals

483
00:27:53,800 --> 00:27:55,439
Speaker 1: want to do a good job, they're going to want

484
00:27:55,480 --> 00:27:57,320
Speaker 1: to be as accurate as possible, so they're going to

485
00:27:57,359 --> 00:28:01,800
Speaker 1: mark your cornea to make sure that they use the

486
00:28:01,840 --> 00:28:04,639
Speaker 1: microcarratone right, I don't even want to talk about it. Microcart.

487
00:28:05,760 --> 00:28:10,240
Speaker 1: It's a surgical instrument, okay. It's a blade, a very

488
00:28:10,520 --> 00:28:14,959
Speaker 1: thin blade, and this blade is used to cut a

489
00:28:15,119 --> 00:28:20,199
Speaker 1: flap in your cornia, which is then pulled back so

490
00:28:20,320 --> 00:28:24,399
Speaker 1: that the laser gets shaped corny. This is this is

491
00:28:24,600 --> 00:28:27,240
Speaker 1: this is entertaining and painful to watch. This is the

492
00:28:27,880 --> 00:28:30,760
Speaker 1: part the grosses me out. I'm sorry. Okay, So yeah,

493
00:28:30,920 --> 00:28:34,360
Speaker 1: so there's actually this and this is lazing. There are

494
00:28:34,400 --> 00:28:36,800
Speaker 1: other versions of laser eye surgery that do not use this,

495
00:28:36,920 --> 00:28:39,880
Speaker 1: and some of them don't even use a microcarratone blade.

496
00:28:39,880 --> 00:28:43,760
Speaker 1: They have a special laser that will cut this flap.

497
00:28:43,800 --> 00:28:46,440
Speaker 1: But an end lazing eye surgery, there is a flap

498
00:28:46,520 --> 00:28:48,920
Speaker 1: that's cut and pulled back so that the laser can

499
00:28:49,040 --> 00:28:52,360
Speaker 1: start to shape the cornia without that outer layer in place.

500
00:28:53,080 --> 00:28:58,040
Speaker 1: And UM. And so at this point, the laser, which

501
00:28:58,080 --> 00:29:01,600
Speaker 1: is um called an well it's an ex semer or

502
00:29:01,720 --> 00:29:04,200
Speaker 1: x simer E x c I M E R I

503
00:29:04,200 --> 00:29:07,240
Speaker 1: actually did not look up the pronunciation. But this is

504
00:29:07,280 --> 00:29:10,600
Speaker 1: the laser that does the actual shaping. It starts to

505
00:29:10,800 --> 00:29:14,440
Speaker 1: vaporize parts of the cornea. And what's doing is it's

506
00:29:14,440 --> 00:29:19,800
Speaker 1: shooting ultraviolet UH blasts and the lasers in the ultraviolet

507
00:29:19,880 --> 00:29:21,960
Speaker 1: lank range, which means you can't see it right, it's

508
00:29:22,000 --> 00:29:25,240
Speaker 1: outside the range of human sight. UM. And what it's

509
00:29:25,280 --> 00:29:29,600
Speaker 1: doing is it's exciting UH the molecules in the cornea

510
00:29:29,640 --> 00:29:32,360
Speaker 1: to the point where the molecular bonds breakdown. So it's

511
00:29:32,440 --> 00:29:35,160
Speaker 1: actually that's what I talk about when vaporizing. It's not

512
00:29:35,440 --> 00:29:39,240
Speaker 1: heating the eyeball up, especially a cool laser. I expect

513
00:29:39,240 --> 00:29:41,320
Speaker 1: you to break down. And when I mean cool laser,

514
00:29:41,360 --> 00:29:44,240
Speaker 1: I don't mean that it's like super awesome, although it is.

515
00:29:44,480 --> 00:29:47,520
Speaker 1: I mean it doesn't heat up the tissue. Now, remember

516
00:29:47,560 --> 00:29:50,160
Speaker 1: earlier I mentioned that your cornea has to be five

517
00:29:50,560 --> 00:29:53,720
Speaker 1: microns are greater when they start this procedure, and that's

518
00:29:53,760 --> 00:29:57,320
Speaker 1: because when they're done using this laser, there has to

519
00:29:57,360 --> 00:30:04,880
Speaker 1: be between two three microns of thickness once they're done. Yeah,

520
00:30:05,320 --> 00:30:06,920
Speaker 1: so there has to be enough for them to leave

521
00:30:07,000 --> 00:30:10,040
Speaker 1: the proper amount once they're finished, otherwise you can't do this.

522
00:30:10,200 --> 00:30:13,720
Speaker 1: So now, now using this laser to vaporize these molecular

523
00:30:13,760 --> 00:30:17,720
Speaker 1: bonds and to reshape your cornea, that's essentially the same

524
00:30:17,800 --> 00:30:23,480
Speaker 1: thing on on a grand concept level as grinding a

525
00:30:23,600 --> 00:30:26,160
Speaker 1: glasses lens. So that's gonna been light the way way.

526
00:30:26,200 --> 00:30:28,520
Speaker 1: It's the same things, just we're using lasers and your

527
00:30:28,560 --> 00:30:32,360
Speaker 1: actual eye to do it, which is pretty phenomenally awesome.

528
00:30:32,840 --> 00:30:35,200
Speaker 1: It's also kind of scary um not at the end

529
00:30:35,200 --> 00:30:38,720
Speaker 1: of it. After it might take I don't know seventeen

530
00:30:38,800 --> 00:30:43,160
Speaker 1: to twenty seconds to do this. Chris's be okay, okay, yeah,

531
00:30:43,200 --> 00:30:47,200
Speaker 1: per i. Um. They then replace the flap back down

532
00:30:47,320 --> 00:30:50,240
Speaker 1: on your eye and it heals. I mean, it sets

533
00:30:50,280 --> 00:30:54,200
Speaker 1: down in place and is is healing as soon as

534
00:30:54,240 --> 00:30:56,680
Speaker 1: it touches back down. That is one of the very

535
00:30:56,680 --> 00:31:00,320
Speaker 1: cool things I think about that. Um. They the doctor

536
00:31:00,360 --> 00:31:03,160
Speaker 1: will also probably put a little antibiotic on the flap

537
00:31:03,280 --> 00:31:05,600
Speaker 1: just to make sure that there are no bacteria getting

538
00:31:05,640 --> 00:31:09,560
Speaker 1: in there. Yeah, but but it maybe it starts to heal,

539
00:31:09,640 --> 00:31:15,440
Speaker 1: which is pretty phenomenal. Um. The the whole process only takes,

540
00:31:15,480 --> 00:31:18,440
Speaker 1: like I said, about twenty seconds per eye. Uh. And uh,

541
00:31:18,760 --> 00:31:21,160
Speaker 1: usually when you're down there, you'll hear people talk about

542
00:31:21,200 --> 00:31:23,560
Speaker 1: how the doctor told him to look at, say like

543
00:31:23,760 --> 00:31:27,120
Speaker 1: a blinking red light. That red light is not the laser.

544
00:31:27,560 --> 00:31:31,560
Speaker 1: That's just a light that let's Yeah, you're supposed to

545
00:31:31,560 --> 00:31:34,520
Speaker 1: focus on that while this ultra violet laser is blasting

546
00:31:34,560 --> 00:31:38,400
Speaker 1: your your cornea way. Um. And then once the flap

547
00:31:38,400 --> 00:31:41,080
Speaker 1: comes down, you're usually you're given several different kinds of

548
00:31:41,080 --> 00:31:45,480
Speaker 1: eye drops before before you leave. Uh, there's a moisturizing

549
00:31:45,480 --> 00:31:48,840
Speaker 1: eye drop because after you get this process done, your

550
00:31:48,840 --> 00:31:51,600
Speaker 1: eyes are gonna have a little bit of difficulty, uh,

551
00:31:51,960 --> 00:31:54,680
Speaker 1: generating the right kind of moisture to keep your eyes comfortable,

552
00:31:54,720 --> 00:31:56,640
Speaker 1: so you're gonna have to actually add eye drops in

553
00:31:56,640 --> 00:31:59,520
Speaker 1: on a pre regular basis. In fact, the first couple

554
00:31:59,560 --> 00:32:01,880
Speaker 1: of days, it's it's like every hour you've got to

555
00:32:01,920 --> 00:32:05,160
Speaker 1: add eye drops, and then as the time goes on,

556
00:32:05,360 --> 00:32:08,080
Speaker 1: you have to use them less and less frequently. And

557
00:32:08,120 --> 00:32:11,400
Speaker 1: my wife at this point rarely ever uses eye drops.

558
00:32:11,960 --> 00:32:14,560
Speaker 1: But for the first year she was using them on

559
00:32:14,560 --> 00:32:17,960
Speaker 1: on a fairly regular basis, although that that schedule changed

560
00:32:18,000 --> 00:32:20,440
Speaker 1: over time, like after the first three months, it didn't

561
00:32:20,440 --> 00:32:23,240
Speaker 1: need to be as frequent. Um. And now it's it's

562
00:32:23,320 --> 00:32:26,280
Speaker 1: rare when she needs them, but occasionally she does. Uh.

563
00:32:26,960 --> 00:32:29,200
Speaker 1: And then you might also have antibotic eye drops that

564
00:32:29,240 --> 00:32:30,920
Speaker 1: you might have to add every now and then. And

565
00:32:31,320 --> 00:32:34,040
Speaker 1: some places apparently put give you a kind of gel

566
00:32:34,160 --> 00:32:36,520
Speaker 1: that you put on the inside of your lower eyelids

567
00:32:36,560 --> 00:32:39,640
Speaker 1: so that when you're asleep, it keeps your eye moisturized

568
00:32:39,640 --> 00:32:43,280
Speaker 1: while you're sleeping. My wife, I don't remember her getting that. UM.

569
00:32:43,280 --> 00:32:45,200
Speaker 1: I should have asked her before I left the house

570
00:32:45,240 --> 00:32:48,240
Speaker 1: this morning, but I do not recall her getting that

571
00:32:48,280 --> 00:32:49,959
Speaker 1: kind of stuff. I do remember the other kinds of

572
00:32:50,000 --> 00:32:54,280
Speaker 1: eye drops though. And then they of course schedule, as

573
00:32:54,920 --> 00:32:58,400
Speaker 1: you know, a lot of surgical procedures. UM. They also

574
00:32:58,520 --> 00:33:01,880
Speaker 1: schedule regular appointments, even even as as soon as the

575
00:33:01,920 --> 00:33:07,400
Speaker 1: next day, to make sure okay, UM. And then gradually

576
00:33:07,440 --> 00:33:11,200
Speaker 1: as time goes on, uh, you know, they check less frequently.

577
00:33:11,440 --> 00:33:13,720
Speaker 1: You know, there'll be a year check up, but you

578
00:33:13,760 --> 00:33:15,760
Speaker 1: know it's one day, and then they'll check the next

579
00:33:15,800 --> 00:33:20,360
Speaker 1: week and the next month, UM an increasing increasingly longer periods,

580
00:33:20,480 --> 00:33:22,120
Speaker 1: just to make sure everything is healing the way it's

581
00:33:22,120 --> 00:33:24,800
Speaker 1: supposed to. Just to make sure that there are um,

582
00:33:24,880 --> 00:33:27,120
Speaker 1: that your eyes are doing what they're supposed to do,

583
00:33:27,240 --> 00:33:29,960
Speaker 1: when you're not suffering any ill effects from the surgery.

584
00:33:30,000 --> 00:33:32,480
Speaker 1: Because in the case of I mean there there are

585
00:33:32,480 --> 00:33:36,680
Speaker 1: times when the flap can get a wrinkle in it. Yeah,

586
00:33:36,720 --> 00:33:38,800
Speaker 1: I was wondering if we're going to get into that. Yeah,

587
00:33:38,840 --> 00:33:40,520
Speaker 1: that can have things like that that can cause a

588
00:33:40,560 --> 00:33:43,520
Speaker 1: little bit of blurry vision and may require a second

589
00:33:43,880 --> 00:33:48,880
Speaker 1: surgical procedure in order to get it straightened out, so

590
00:33:49,040 --> 00:33:52,000
Speaker 1: you speak. UM. Also, you know, there's a possibility that

591
00:33:52,040 --> 00:33:56,600
Speaker 1: they may remove too little or too much of the

592
00:33:56,640 --> 00:34:00,440
Speaker 1: cornea UM. So they have to be. Yeah, they have

593
00:34:00,520 --> 00:34:02,480
Speaker 1: to be. That's why they that's why they're doing that

594
00:34:02,600 --> 00:34:06,000
Speaker 1: whole long pre ops sections, so that they can determine

595
00:34:06,040 --> 00:34:10,120
Speaker 1: that as precisely as possible to to reduce that risk

596
00:34:10,239 --> 00:34:12,759
Speaker 1: as much as they can. And of course, again this

597
00:34:12,800 --> 00:34:15,120
Speaker 1: also depends a lot on the patient. You have to

598
00:34:15,160 --> 00:34:17,120
Speaker 1: be able to lay there and be still while your

599
00:34:17,120 --> 00:34:19,600
Speaker 1: eye is being held open and lasers are being shot

600
00:34:19,640 --> 00:34:22,600
Speaker 1: into it after someone's kind of flapping it. It's a

601
00:34:22,600 --> 00:34:24,480
Speaker 1: little it's a bit of a challenge for some of us.

602
00:34:24,760 --> 00:34:27,319
Speaker 1: Um let's talk really quickly about some of the other

603
00:34:27,400 --> 00:34:31,400
Speaker 1: kinds of laser ice surgery besides lazing. The one of

604
00:34:31,480 --> 00:34:34,279
Speaker 1: the the precursors to lazing, and it's still in use

605
00:34:34,280 --> 00:34:37,200
Speaker 1: in a lot of places is PRK laser ice surgery

606
00:34:37,320 --> 00:34:42,040
Speaker 1: or photo refractive care TECTO me. Oh, I didn't know

607
00:34:42,080 --> 00:34:43,799
Speaker 1: I was gonna be able to say that. In this one,

608
00:34:43,840 --> 00:34:48,080
Speaker 1: they actually scrape away the outermost layer of the cornea

609
00:34:48,680 --> 00:34:52,480
Speaker 1: with the laser and then reshape the tissue on the

610
00:34:52,600 --> 00:34:56,600
Speaker 1: underlying surface of the cornea um and then they have

611
00:34:56,680 --> 00:35:00,400
Speaker 1: and then you have to allow the the protective layer

612
00:35:00,480 --> 00:35:03,160
Speaker 1: that was scraped off to grow back, so there's actually

613
00:35:03,200 --> 00:35:07,040
Speaker 1: a longer healing period with PRK than with laze. They

614
00:35:07,040 --> 00:35:09,839
Speaker 1: can use that process to uh to work on near

615
00:35:09,880 --> 00:35:12,640
Speaker 1: sidedness and a stigmatism at the same time, however, which

616
00:35:12,640 --> 00:35:16,920
Speaker 1: is nice. Yep. And uh. Then there's lazac with an E.

617
00:35:17,440 --> 00:35:20,719
Speaker 1: The lasic we're talking about is with an eye, but

618
00:35:20,880 --> 00:35:24,480
Speaker 1: lazac is a slightly more advanced version of PRK that

619
00:35:24,560 --> 00:35:28,760
Speaker 1: uses um alcohol and solution to soften and then remove

620
00:35:28,880 --> 00:35:32,719
Speaker 1: the epithelium, which is that protective layer, that almost layer

621
00:35:32,760 --> 00:35:38,319
Speaker 1: of the cornium. Yeah, lasac is a laser epithelial caratatamliusis Yeah,

622
00:35:38,880 --> 00:35:41,000
Speaker 1: I think I didn't mangle that terribly yep. And then

623
00:35:41,040 --> 00:35:44,719
Speaker 1: there's epilasac, the modified version of that that uses a

624
00:35:44,760 --> 00:35:49,839
Speaker 1: separator so that the because then in the traditional laze

625
00:35:49,920 --> 00:35:54,400
Speaker 1: you're actually removing the epithelium entirely, and epilasic you're creating

626
00:35:54,400 --> 00:35:57,799
Speaker 1: a separator so that you preserve that epithelium and then

627
00:35:57,840 --> 00:35:59,960
Speaker 1: replace it on the ice. So it's like you take

628
00:36:00,040 --> 00:36:02,400
Speaker 1: the cover off, fiddle around a bit, and put the

629
00:36:02,440 --> 00:36:05,880
Speaker 1: cover back on. It's probably a bet the eye surgeons

630
00:36:05,880 --> 00:36:08,919
Speaker 1: out there just love me for saying that um there's

631
00:36:09,080 --> 00:36:15,160
Speaker 1: l t K or laser thermo keratoplasty. Uh No. It's

632
00:36:15,239 --> 00:36:18,960
Speaker 1: used mainly for far sightedness and a stigmatism. And in

633
00:36:18,960 --> 00:36:21,480
Speaker 1: this case they actually are using heat. They're using the

634
00:36:21,480 --> 00:36:24,840
Speaker 1: heat of a laser beam to shrink and reshape the

635
00:36:24,920 --> 00:36:28,279
Speaker 1: cornea rather than removing it, so they're actually reshaping it.

636
00:36:28,280 --> 00:36:32,440
Speaker 1: They're pushing the stuff around as opposed to cutting it away. Um.

637
00:36:32,480 --> 00:36:35,560
Speaker 1: And it's supposedly a much faster healing process than most

638
00:36:35,600 --> 00:36:39,360
Speaker 1: other kinds of corrective surgery, and it's generally considered to

639
00:36:39,400 --> 00:36:46,760
Speaker 1: be less invasive, so it's uh, that's an interesting approach.

640
00:36:46,800 --> 00:36:51,960
Speaker 1: There's also there's a custom view lazic, conventional intra lazic,

641
00:36:52,200 --> 00:36:56,160
Speaker 1: custom view intra lazic. These are all variations on the

642
00:36:56,200 --> 00:37:01,080
Speaker 1: basic lazic approach basic lazing, and there are of course

643
00:37:01,120 --> 00:37:04,399
Speaker 1: complications with some of these. We mentioned some before. I've

644
00:37:04,440 --> 00:37:07,960
Speaker 1: I've known people to undergo lasic and complain of some

645
00:37:08,000 --> 00:37:11,239
Speaker 1: problems with night vision where they see halos. There's a

646
00:37:11,239 --> 00:37:16,440
Speaker 1: lot of that where everyone looks like master Chief No. Um. Basically,

647
00:37:16,520 --> 00:37:18,080
Speaker 1: when you look at a light source, it looks like

648
00:37:18,120 --> 00:37:22,160
Speaker 1: it has shimmering circle around it. Yeah. Yeah, especially things

649
00:37:22,160 --> 00:37:23,960
Speaker 1: for like if you're driving at night and you'll know

650
00:37:24,200 --> 00:37:27,800
Speaker 1: no halos around headlights things like that, or you're sensitive

651
00:37:27,840 --> 00:37:30,799
Speaker 1: to bright light. Yeah, yeah, you're light sensitivity. Especially for

652
00:37:30,840 --> 00:37:33,279
Speaker 1: the first few days, it's probably gonna be a little, uh,

653
00:37:33,600 --> 00:37:35,960
Speaker 1: a little rough. But for some people it just it

654
00:37:36,040 --> 00:37:38,640
Speaker 1: stays that way. So like my wife, she wears sunglasses

655
00:37:38,640 --> 00:37:41,720
Speaker 1: a lot more frequently than she used to. And uh

656
00:37:41,960 --> 00:37:46,960
Speaker 1: for for some people too, I've heard that in some cases, uh,

657
00:37:46,960 --> 00:37:50,759
Speaker 1: it is possible for your eyes basically to slowly regress

658
00:37:50,800 --> 00:37:55,200
Speaker 1: to where they were before. Um. I don't know exactly

659
00:37:55,200 --> 00:37:57,440
Speaker 1: why that is, you know, I have read reports that

660
00:37:57,440 --> 00:38:01,200
Speaker 1: that it happens. Um. But and you know, some people

661
00:38:01,320 --> 00:38:04,200
Speaker 1: who have and you know, enjoyed the benefits of the

662
00:38:04,239 --> 00:38:07,680
Speaker 1: surgery for years, and then there are others who gradually

663
00:38:08,000 --> 00:38:10,839
Speaker 1: returned to uh, to the way they were before. I'm

664
00:38:10,840 --> 00:38:13,440
Speaker 1: sure that it probably since since part of the corney

665
00:38:13,480 --> 00:38:16,000
Speaker 1: has been removed, I would imagine that it's probably not

666
00:38:16,080 --> 00:38:19,439
Speaker 1: as uh drastic a change so it was. But I've

667
00:38:19,480 --> 00:38:22,200
Speaker 1: I've read that that that can happen. I would imagine

668
00:38:22,200 --> 00:38:24,200
Speaker 1: if you have some sort of condition that continues to

669
00:38:24,440 --> 00:38:27,000
Speaker 1: change the shape of your eyeball, that would be that

670
00:38:27,000 --> 00:38:29,080
Speaker 1: would be a big problem because the focal point would

671
00:38:29,120 --> 00:38:32,640
Speaker 1: constantly be changing then or gradually be changing. Well, guys,

672
00:38:32,680 --> 00:38:35,480
Speaker 1: that's it. That's another classic episode of tech Stuff in

673
00:38:35,520 --> 00:38:39,640
Speaker 1: the books. I really love looking back on these After

674
00:38:39,680 --> 00:38:43,839
Speaker 1: recording more than a thousand episodes of this show, it's

675
00:38:43,840 --> 00:38:46,800
Speaker 1: sometimes a journey of discovery for me to go back

676
00:38:46,960 --> 00:38:49,400
Speaker 1: and look at these old episodes. And also it's just

677
00:38:49,440 --> 00:38:52,640
Speaker 1: fun to think back on working with Chris Poulette. He

678
00:38:52,680 --> 00:38:55,719
Speaker 1: was a great co host and editor. So Chris, if

679
00:38:55,760 --> 00:38:58,960
Speaker 1: you're out there listening to this, we miss you, buddy.

680
00:38:59,400 --> 00:39:02,120
Speaker 1: If you, guys, suggestions for future episodes of tech Stuff,

681
00:39:02,160 --> 00:39:04,759
Speaker 1: whether it's a technology, a company, a person in tech,

682
00:39:05,239 --> 00:39:07,000
Speaker 1: maybe there's someone you would like me to interview on

683
00:39:07,040 --> 00:39:09,360
Speaker 1: the show, let me know. Send me an email. The

684
00:39:09,400 --> 00:39:12,680
Speaker 1: addresses tech Stuff at how stuff works dot com or

685
00:39:12,760 --> 00:39:14,959
Speaker 1: draw me a ligne on Facebook or Twitter. The handle

686
00:39:14,960 --> 00:39:18,000
Speaker 1: of both of those is tech Stuff hs W. Don't forget.

687
00:39:18,400 --> 00:39:21,799
Speaker 1: You can find our merchandise over at t public dot

688
00:39:21,840 --> 00:39:24,879
Speaker 1: com slash tech stuff. That's t e public dot com

689
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Speaker 1: slash tech Stuff. There's all sorts of fund designs and

690
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691
00:39:30,160 --> 00:39:32,600
Speaker 1: to help the show, so we greatly appreciate it. And

692
00:39:32,719 --> 00:39:36,120
Speaker 1: oh oh, also we're on Instagram. You should be following

693
00:39:36,239 --> 00:39:44,600
Speaker 1: us and I'll talk to you again really soon. For

694
00:39:44,680 --> 00:39:47,160
Speaker 1: more on this and thousands of other topics, visit how

695
00:39:47,239 --> 00:39:58,120
Speaker 1: stuff works dot com