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LASIK Ablation Profiles for Nearsightedness, Farsightedness and Astigmatism
Surgical correction of a refractive error is achieved by making a precisely
calculated change in the refractive power of the cornea.
| Nearsightedness |
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The refractive power of the eye is reduced by flattening the central
cornea. This reduces the refractive power of the eye so that ideally,
rays of light will come to focus properly on the retina after surgery.
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| Farsightedness |
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For the correction of farsightedness, the curvature of the cornea
is enhanced by a ring-shape ablation. This increases the refractive
power of the eye so that ideally, after the surgery, rays of light
will come to focus properly on the retina. |
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| Astigmatism
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Astigmatism, if present, is corrected during the procedures for nearsightedness
or farsightedness as described above. The corneal surface is ablated
in a way that it comes as close as possible to the ideal "ball-like"
shape. |
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