Anatomy of the eye
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Near sightedness (myopia)
Farsightedness (hyperopia)
When your eyeball is slightly longer than normal or when the cornea curves too sharply, light rays focus in front of the retina and blur distant vision. You can see objects that are close fairly clearly, but not those that are far away.
When your eyeball is slightly longer than normal or when the cornea curves too sharply, light rays focus in front of the retina and blur distant vision. You can see objects that are close fairly clearly, but not those that are far away.
LASIK surgery causes a temporary decrease in tear production. For the first six months or so after your surgery, your eyes may feel unusually dry as they heal. Dry eyes can reduce the quality of your vision. Your eye doctor might recommend eyedrops for dry eyes. If you experience severe dry eyes, you could opt for another procedure to get special plugs put in your tear ducts to prevent your tears from draining away from the surface of your eyes.
You may have difficulty seeing at night after surgery, which usually lasts a few days to a few weeks.
You might notice increased light sensitivity, glare, halos around bright lights or double
vision.
Even when a good visual result is measured under standard testing conditions, your vision in dim light
(such as at dusk or in fog) may be reduced to a greater degree after the surgery than before the
surgery.
If the laser removes too little tissue from your eye, you won’t get the clearer vision results you were hoping for. Under corrections are more common for people who are near sighted. You may need another LASIK procedure within a year to remove more tissue.
It’s also possible that the laser will remove too much tissue from your eye. Overcorrections may be more difficult to fix than under corrections.
Astigmatism can be caused by uneven tissue removal. It may require additional surgery, glasses or contact lenses.
Folding back or removing the flap from the front of your eye during surgery can cause complications, including infection and excess tears. The outermost corneal tissue layer may grow abnormally underneath the flap during the healing process.
Regression is when your vision slowly changes back toward your original prescription. This is a less common complication.
Rarely, surgical complications can result in loss of vision. Some people also may not see as sharply or clearly as previously.
