Keratoconus is a condition where the front part of your eye (the cornea) becomes abnormally thin and steep compared to a normal cornea. This causes the cornea to become irregular. Because the cornea is irregular, normal glasses and contact lenses typically do not provide clear vision for people with Keratoconus.
The exact cause of Keratoconus is still unknown. However, research has shown that it is often associated with eye allergies, excessive eye rubbing, connective tissue disorders, and a genetic predisposition.
Because of the highly irregular cornea that develops due to Keratoconus, the optimal vision is usually obtained with a special type of contact lens called a Scleral Lens. This lens vaults over the misshapen cornea and, in essence, acts like a “new” cornea for the patient. This creates crisp and stable vision all day.