Orthokeratology (awr-thoh-ker-uh-tol-uh-jee), or corneal reshaping is the use of custom designed gas permeable contact lenses to reshape the cornea and correct for nearsightedness.  Patients who undergo orthokeratology wear their contact lenses at night, while sleeping, and generally do not require any vision correction during the day. For optimal vision correction, orthokeratology lenses are typically worn each night for a minimum of 8 hours. The results of orthokeratology are reversible and there is no permanent change to the cornea. Orthokeratology lenses are an excellent option for active adults and children who desire freedom from spectacle or contact lens wear during their daily tasks and are unsure of or not eligible for refractive surgery such as LASIk. FDA approved for the use in children, orthokeratology lenses are also an excellent option for the young athlete who swims, surfs or plays water polo.