Ortho-K, or OK lenses, is a non-surgical treatment that reshapes the cornea while the patient sleeps, providing clear vision without the need for glasses or daytime contact lenses. It is FDA-approved, safe, effective, and suitable for both children and adults, especially those involved in sports or suffering from allergies. The treatment involves an initial exam, custom fitting of lenses, and follow-up visits to ensure optimal vision is achieved, typically within one to four weeks.