Orthokeratology
A method of refractive error management that involves using special rigid gas permeable lenses to modify and shape the corneal epithelium, therefore changing the way light is refracted into the eye. Patients will typically wear the rigid lenses to sleep, during which the corneal epithelium becomes remodeled overnight. Full correction in patients with myopia can be achieved within a week but lenses must be continued to be worn nightly to retain the correction. The side effects that accompany this method of correction include glare, especially during nights and decreased contrast sensitivity. The effect of orthokeratology is completely reversible by discontinuing lens wear
