A Close-up Look at Improving ... Video Transcript

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Lasik surgery was the first and has often been used to correct distance vision, although it is also used to help with reading.

PENNY ASBELL, MD: When we use a laser, we actually take off a small part of the cornea to change the shape. The cornea is the front window of the eye. If we change its shape, we can change the vision and get rid of contact lenses and glasses, and it can work extremely well. There's cutting involved. There's tissue removed. There's a permanent change to the eye.

ANNOUNCER: This type of surgery can change the life of someone who has worn glasses for much of their life. But problems can develop in certain people.

PENNY ASBELL, MD: If you already come into it with significant dry eyes, it may get worse after the laser procedure. If you're concerned about glare or halos, like with driving a car, sometimes that's a symptom that laser patients have after the procedure.

ANNOUNCER: Another procedure called CK uses a type of energy that comes from radio waves. CK is only used in people to correct difficulty reading.

PENNY ASBELL, MD: CK stands for conductive keratoplasty. CK is a little bit different. There's no tissue removed. There's no cutting. It's done all on the edge or the outer part of the cornea. And because of that, there's really a little less risk. We use a tiny probe that delivers energy to the part of the window called the stroma, and it shrinks that tissue ever so much, kind of like cinching a belt to tighten the cornea and make the central part steeper. So that small amount of energy is delivered. It shrinks the collagen tissue, the tissue in the cornea and cinches it so the cornea domes up or steepens up in the center.

ANNOUNCER: CK and Lasik: two different options for those who want to toss their glasses. But experts stress that neither is a sure-fire perfect solution.

PENNY ASBELL, MD: There's some variability in how the patient's going to respond, how they're going to heal and the final result that they're going to have. They may have good everyday vision for driving a car, reading a menu. But are they going to read War and Peace, you know, 1,000-page book, they may want to have reading glasses for their very best vision for reading in both eyes.

ANNOUNCER: And the hard truth is that no matter what you do, the aging process continues.

PENNY ASBELL, MD: People need to realize that they may need to come back and do a little bit more because their eyes have aged and they need more correction.

It would happen with laser or CK or contact lenses. Contact lenses, we'd be changing the power. In glasses, we'd be changing the glasses power.

ANNOUNCER: Still, at least now there are choices for the time when your arms get "too short."

PENNY ASBELL, MD: You could get corrected with glasses. You could get corrected with contact lenses. If those aren't for you, refractive surgery is another alternative. And fortunately, we have a lot of options for that, and many of them work very well.

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