LASIK for the correction of Myopia (nearsightedness): Laser vision correction is the most technologically advanced method available today for the correction of myopia. Nearsightedness occurs when the co mea is too curved or the eye is too long resulting in blurry distance vision. LASIK corrects myopia by removing tissue from the center of the cornea. This flattens the cornea and reduces the focusing power of the cornea. Light, which was focused in front of the retina, is now shifted to focus onto the retina, crating a clear image of distance objects.
LASIK for the correction of Hyperopia (farsightedness): Hyperopia occurs when the cornea is excessively flat or the eye is too short. This causes light to focus at a point behind the retina. Both distance and near vision are blurred, but near vision is more blurred than distance vision. Typically, hyperopic patients need corrective lenses to see up close before the age of 40 and require bifocals to correct distance and near vision thereafter.
To treat hyperopia, the central cornea must be made steeper. This is accomplished by directing the laser beam to remove tissue from the peripheral cornea while preserving the central area. Steepening the central cornea increases the focusing power of the eye. The light, which was focused behind the retina, is shifted and now is focused onto the retina. This clears distance vision and improves near vision. |