​Orthokeratology, often referred to as Ortho-K, is a non-surgical method that uses specially designed contact lenses to temporarily reshape the cornea, providing clear vision without the need for glasses or daytime contact lenses. https://medium.com/@drahulraghav/orthokeratology-contact-lenses-reshaping-your-cornea-for-clear-vision-f3fdcd3c7281