LASIK stands for Laser Assisted in-Situ Keratomileusis. This breakthrough procedure uses advanced laser technology to correct nearsightedness, farsightedness, and astigmatism. Through the use of this technology, we can now correct problems with both distance and reading vision, and thereby reduce or eliminate one’s dependence on glasses and contact lenses.
How the Eye Functions
The eye functions much like a camera. In the same way that a camera utilizes a lens to focus light onto film in order to produce a picture, our eyes utilize lenses to focus light onto the film of the eye called the retina. The retina then sends the light images to the brain for processing through the optic nerve. The end result of this intricate processing of light rays is eyesight.
The cornea is the primary lens of the eye, and does 80% of the focusing of light onto the retina. The cornea is a curved lens and its shape determines its focusing ability.
If the cornea is too steeply curved, light focuses in front of the retina, causing nearsightedness. Nearsighted individuals see well up close, but see poorly at distance without corrective lenses.
If the corneal curvature is too flat, light focuses behind the retina, causing farsightedness. Farsighted individuals see well at distance, but see poorly up close with corrective lenses.
If the corneal curvature is oval, astigmatism is produced and light does not come to a single focus. Individuals with astigmatism see poorly at both distance and near.
The LASIK Procedure
LASIK Step 1:
Using an instrument called a microkeratome, a thin layer of corneal tissue is folded back.
LASIK Step 2:
The Excimer laser is used to remove a predetermined amount of corneal tissue to correct for the individual focusing error (nearsightedness, farsightedness, astigmatism).
LASIK Step 3:
The corneal layer is replaced in its original position where it heals securely in place.
Each person’s vision is 100 percent unique to their eyes. Before the recent advancements in technology, doctors were only able to use standard measurements to correct vision, meaning that prescriptions could only provide a certain level of correction regardless of an individual’s needs.
Now, using the VISX CustomVue laser vision correction system, the USC Roski Eye Institute can measure and address the unique imperfections of each individual’s vision and provide them with their personal best vision.
Finding the LASIK Care You Need
The Los Angeles ophthalmologists at the USC Roski Eye Institute have helped countless patients receive the individualized eye care they need for their unique conditions. To learn more about LASIK care at the USC Roski Eye Institute, get in touch with us today by calling 323-442-6335 or by filling out the online content form.
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