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Basik lasik:

Tips on Lasik Eye Surgery

If you’re tired of wearing glasses or contact lenses, you may be considering Lasik eye
surgery — one of the newest procedures to correct vision problems. Before you sign
up for the surgery, get a clear picture of what you can expect.
To see clearly, the cornea and the lens must bend — or refract — light rays so they
focus on the retina — a layer of light-sensing cells that line the back of the eye. The
retina converts the light rays into impulses that are sent to the brain, where they are
recognized as images. If the light rays don’t focus on the retina, the image you see is
blurry. This is called a refractive error. Glasses, contacts and refractive surgery
attempt to reduce these errors by making light rays focus on the retina.
Refractive errors are caused by an imperfectly shaped eyeball, cornea or lens, and
are of three basic types:
• myopia — nearsightedness; only nearby objects are clear.
• hyperopia — farsightedness; only objects far away are clear.
• astigmatism — images are blurred at a distance and near.
There’s also presbyopia — “aging eye.” The condition usually occurs between ages
40 and 50, and can be corrected with bifocals or reading glasses.
Lasik is surgery to a very delicate part of the eye.

Hundreds of thousands of people have had Lasik, most very successfully.
As with any surgery, there are risks and possible complications. Lasik may not give
you perfect vision. The American Academy of Ophthalmology (AAO) reports that
seven out of 10 patients achieve 20/20 vision, but 20/20 does not always mean
perfect vision.
If you have Lasik to correct your distance vision, you’ll still need reading glasses
around age 45. Lasik surgery is too new to know if there are any long-term ill effects
beyond five years after surgery. Lasik surgery cannot be reversed. Most insurance
does not cover the
surgery. You may need additional surgery — called “enhancements” — to get the
best possible vision after Lasik.
Are You a Good Candidate for Lasik?

Lasik is not for everyone.
• You should be at least 18 years old (21 for some lasers), since the vision of people
younger than 18 usually continues to change.
• You should not be pregnant or nursing as these conditions might change the
measured refraction of the eye.
• You should not be taking certain prescription drugs, such as Accutane or oral
• Your eyes must be healthy and your prescription stable. If you’re myopic, you
should postpone Lasik until your refraction has stabilized, as myopia may continue to
increase in some patients until their mid to late 20s.
• You should be in good general health. Lasik may not be recommended for patients
with diabetes, rheumatoid arthritis, lupus, glaucoma, herpes infections of the eye, or
cataracts. You should discuss this with your surgeon.
• Weigh the risks and rewards. If you’re happy wearing contacts or glasses, you may
want to
forego the surgery.
• Understand your expectations from the surgery. Are they realistic?
• Ask your doctor if you’re a candidate for monovision — correcting one eye for
distance vision and the other eye for near vision.
Lasik cannot correct presbyopia so that one eye can see at both distance and near.
However, Lasik can be used to correct one eye for distance and the other for near. If
you can adjust to this correction, it may eliminate or reduce your need for reading
glasses. In some instances, surgery on only one eye is required. If your doctor thinks
you’re a candidate, ask about the pros and cons.
Finding a Surgeon

Only ophthalmologists (Eye MDs) are permitted to perform Lasik. Ask your Eye MD
or optometrist for a referral to an Eye MD who performs Lasik. The American
Academy of
Ophthalmology website ( feature “Find an Eye MD” can provide you
with a list of their members who perform Lasik. Ninetyfive percent of all
ophthalmologists (Eye MDs) are Academy members. Also, the International Society
of Refractive Surgery website ( will provide you with
names of refractive surgeons.
Ask your surgeon the following questions:

1. How long have you been doing Lasik
2. How much experience do you have with the Lasik procedure?
3. How do you define success?
What’s your success rate? What is the chance for me (with my correction) to achieve
20/20? How many of your patients have achieved 20/20 or 20/40 vision? How many
patients return for enhancements? In general 5-15% return.
4. What laser will you be using for my surgery? Make sure your surgeon is using a
laser approved by the U.S. Food and Drug Administration (FDA).
5. What’s involved in after-surgery care?
6. Who will handle after-surgery care? Who will be responsible?
7. What about risks and possible complications?
Risks and Possible Complications
Before the surgery, your surgeon should explain to you the risks and possible
complications, and potential side effects, including the pros and cons of having one
or both eyes done on the same day. This is the “informed consent” process. Some
risks and possible complications include:
• Over- or under-correction. These problems can often be improved with glasses,
contact lenses and enhancements.
• Corneal scarring, irregular astigmatism (permanent warping of the cornea), and an
inability to wear contact lenses.
• Corneal infection.
• “Loss of best corrected visual acuity” — that is, you would not be able to see as well
after surgery, even with glasses or contacts, as you did with glasses or contacts
before surgery.
• A decrease in contrast sensitivity, “crispness,” or sharpness. That means that even
though you may have 20/20 vision, objects may appear fuzzy or grayish.
• Problems with night driving that may require glasses.
• Flap problems, including: irregular flaps, incomplete flaps, flaps cut off entirely, and
ingrowth of cells under the flap.
The following side effects are possible, but usually disappear over time. In rare
situations, they may be permanent.

• Discomfort or pain
• Hazy or blurry vision
• Scratchiness
• Dryness
• Glare
• Haloes or starbursts around lights
• Light sensitivity
• Small pink or red patches on the white of the eye
Surgery: What to Expect Before, During and After

You’ll need a complete eye examination by your refractive surgeon. A preliminary eye
exam may be performed by a referring doctor (Eye MD or optometrist). Take your
eye prescription records with you to the exams. Your doctor should:
• Dilate your pupils to finetune yourprescription.
• Examine your eyes to make sure they’re healthy. This includes a glaucoma test and
a retina exam.
• Take the following measurements:
- The curvature of your cornea and your pupils. You may be rejected if your pupils
are too large.
- The topography of your eyes to make sure you don’t have an irregular astigmatism
or a cone-shaped cornea — a condition called Keratoconus.
- The pachymetry — or thickness — of your cornea. You need to have enough tissue
left after your corneas have been cut and reshaped.
• Ask you to sign an informed consent form after a thorough discussion of the risks,
benefits, alternative options and possible complications. Review the form carefully.
Don’t sign until you understand everything in the form.
• If your doctor doesn’t think Lasik is right for you, you might consider getting a
second opinion; however, if the opinion is the same, believe it. If you qualify for
surgery, your doctor may tell you to stop wearing your contact lenses for a while
before the surgery is scheduled because contacts can temporarily change the shape
of the cornea. Your cornea should be in its natural shape the day of surgery. Your
doctor also may tell you to stop wearing makeup, lotions or perfume for a few days
before surgery. These products can interfere with the laser treatment or increase the
risk of infection after surgery.
Lasik is an outpatient surgical procedure. The only anesthetic is an eye drop that
numbs the surface of the eye. The surgery takes 10 to15 minutes for each eye.
Sometimes, both eyes are done during the same procedure; but sometimes,
surgeons wait to see the result of the
first eye before doing the second eye.
The Surgical Procedure:
A special device cuts a hinged flap of thin corneal tissue off the outer layer of the
eyeball (cornea) and the flap is lifted out of the way. The laser reshapes the
underlying corneal tissue, and the surgeon replaces the flap, which quickly adheres
to the eyeball.
There are no stitches. A shield — either clear plastic or perforated metal — is placed
over the eye to protect the flap.


Healing is relatively fast, but you may want to take a few days off after the surgery.
Be aware that:

• You may experience a mild burning or sensation for a few hours after surgery. Do
not rub your eye(s). Your doctor can prescribe a painkiller, if necessary, to ease the
• Your vision probably will be blurry the day of surgery, but it will improve
considerably by
the next day when you return for a follow-up exam.
• If you experience aggravating or unusual side effects, report them to your doctor
• Do not drive until your vision has improved enough to safely do so.
• Avoid swimming, hot tubs and whirlpools for two weeks after surgery.
Alternatives to Lasik

You may want to discuss some surgical alternatives to Lasik with your eye doctor:
• Photorefractive keratectomy (PRK) is a laser procedure used to reduce myopia,
and astigmatism without creating a corneal flap.
• Astigmatic keratotomy (AK) is an incisional procedure to reduce astigmatism.
• Intrastromal corneal rings are clear, thin, polymer inlays placed on the eye to
correct low myopia only.


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