What is Orthokeratology? Orthokeratology, also known as corneal refractive therapy and Ortho-K, or overnight vision correction, advertised under various brand names such as eyedream, OK lens, dreamlens, miraclens, GOV, i-GO-OVC, CRT, wake and See, emerald, Fargo and iSee, is the practice of inflexible or stiff gas permeable contact lenses, usually worn during nighttime only in order to enhance the vision in cornea reshaping. This procedure can be utilized as a substitute to refractive surgery, eyeglasses or for the one who choose not use contact lenses. The result may be because of uneasiness from dusty setting or air-conditioned, from prolong computer use that breaks the rate of blinking.
