What is Orthokeratology?
Orthokeratology (also known as OrthoK, OK, corneal reshaping, corneal refractive therapy (CRT), or vision shaping treatment (VST)) involves gently reshaping the cornea to temporarily modify or eliminate refractive error. OrthoK is an innovative way of wearing contact lenses – custom lenses are worn overnight, temporarily altering the shape of the cornea enough to produce clear, lasting vision after removal and throughout the day.