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Orthokeratology is a technique using contact lenses, much like orthodontic braces, to reduce a patients nearsighted prescription. The contact lenses used in orthokeratology are similar to regular contact lenses, except that they are designed to compensate for blurred sight and make modifications in the shape of the cornea. The cornea is the eye's transparent front surface which covers the colored iris and pupil like a small watch crystal. Because light entering the eye passes through the cornea first, its structure has a significant influence on the way we see. Eye health and corneal integrity are always studied by the doctor during a routine contact lens examination. For many years it has been observed that just as a watch band or ring will reshape the skin underneath, eye tissue conforms to the lens. Final results determining the effects on eye tissue will not be available for years, but preliminary reports from clinicians in private practice would indicate that orthokeratology is harmless when it is conducted by competent practitioners while thoroughly supervised. How long does it take? The course of treatment may last several months or several years. Even a doctor cannot be certain, but every effort is made to evaluate the situation so patients can weigh the facts before reaching a decision to proceed. Can the new soft contact lenses be worn for orthokeratology? No, because the curvature of the lens depends upon the visual defect. During treatment, new contact lenses are fitted as the cornea responds and gradually assumes the shape of the lens. Flexible soft contact lenses do not influence corneal curvature. Will I ever have to wear contact lenses or glasses again after orthokeratology? When the cornea of the eye has reached its best curvature for clearest sight, a "retainer" lens is provided. This lens helps hold the cornea in its correct shape, just as a retainer brace is worn during orthodontic treatment. For persons who have achieved clear sight, these retaining lenses are worn intermittently as needed. |