Have you ever wondered what those numbers on your eyeglass prescription actually mean? Although reading an eye chart is a fairly simple test, it provides a very accurate way to measure your visual ...View Article
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Ortho-K, also known by the medical term orthokeratology, is a method of reshaping the cornea to improve vision. Specially designed contact lenses are fitted into the eyes, slowly reshaping the cornea over time.
Most of the time, Ortho-K lenses are worn at night. That gives them several hours to restructure your eyes while you're sleeping. If you continue to wear the lenses at night, you will see an improvement in vision. The improvements are reversible, but they usually maintain if you continue to wear the lenses as directed by your medical provider.
Ortho-K is used to correct myopia, better known as nearsightedness. While nearsightedness can be corrected with the use of eyeglasses, many people want to go without glasses and contacts. Ortho-K is a way to do that without requiring surgery.
Ortho-K may be advised for children who have myopia. This is because more permanent solutions, like LASIK, can't be recommended until the person's vision is stable.
When using this treatment, patients should expect to wear their specialty contacts every night. The treatment works by reforming the flexible tissues of the eyes. The lens flattens the center of the cornea, which changes the way light bends as it enters the eyes.
Once you remove the lens in the morning, the cornea stays in the reformed shape. However, if you stop wearing the lenses, the cornea will eventually return to the original shape and the refractive error leading to poorer eyesight will occur once again. By wearing the contacts regularly, you're able to significantly improve your vision and avoid wearing contacts or glasses during the day.
It takes around two weeks for the lenses to reach the maximum level of vision correction. Most patients achieve 20/40 vision (or better), according to the studies performed by the Food and Drug Administration.
Like with braces, it may be necessary to go through a series of adjustments before the lenses reach the best shape for correction. Once achieved, patients continue to wear the final pear of lenses to maintain the correction.