Orthokeratology, also known as Ortho K, is a process utilizing specially designed contact lenses, called retainers, to gently reshape the top of the cornea to reduce myopia (nearsightedness.)
Most anyone with myopia. The best success has been with people under age 40. Children with progressive myopia can utilize orthokeratology to slow down myopia progression.
You wear retainers at night only. During the day you should be able to see without the need for glasses or contacts. Since the retainers are gently reshaping the top of the cornea, it can sometimes take a few days to get good vision at distance. This depends on the starting prescription. During this transition time, a reduced prescription soft contact lens can be worn during the day if needed.