Scleral Contact Lenses also used to cure for Keratoconus :

Keratoconus is a challenging disease that affects each patient in a unique manner. Most keratoconic patients can wear special gas permeable lenses quite well. However, if the keratoconus is very advanced, or if the corneal tissue is compromised, corneal gas permeable lenses may not be tolerated well. In situations such as these, scleral lenses usually work very well.