In order to understand how a Lasik procedure is performed, it's important to understand what causes irregularities in your vision.
|"I have been dependent on my glasses since age 7. This was the best decision I have ever made. The first morning I woke up and could see the time on the clock without my glasses. I hope others don't wait as long as I did to make their dreams come true."
The normal eye experiences clarity of vision because light rays pass through the cornea, pupil and lens, and focus directly on the retina. The image of the target object is formed in the proper location of the retina for sharp, clear and focused vision.
Myopia or nearsightedness, is a condition when the eye is horizontally elongated and/or the cornea is overly curved. This causes light rays to focus in front of the retina resulting in blurry distance vision. Treatment for Myopia involves slightly flattening the cornea. This is accomplished by focusing the laser's beam to remove tissue from the center of the cornea.
Hyperopia or farsightedness, is a condition when the eye is too short and/or the cornea is flatter than normal. This causes light rays to focus beyond the retina creating blurry close-up vision. Treatment for Hyperopia is an adjustment that involves slightly steepening the cornea. This is done by focusing the laser on removing tissue from the periphery of the cornea. The final pattern resembles the shape of a donut.
Astigmatism occurs when a cornea is shaped more like a football. This means the cornea is curved more in one direction than the other. This causes light to focus on more than one point, creating distortions and ghosted or multiple-image vision. Treatment for Astigmatism involves reshaping the cornea to be rounder and more balanced, or even. The laser's beam pattern removes more tissue from one direction than the other rendering the cornea with the desired shape.
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