Keratoconus (ker-uh-toe-KOH-nus) is a progressive eye disease that occurs on the cornea, the clear lens on the front surface of your eye. Keratoconus (which in Latin translates to “cone-shaped”) causes the cornea to become gradually thinner, which can lead to the outward bulging of the cornea. This can cause a cone like appearance to occur within the cornea. The disease can cause vision to become extremely blurry and many patients complain of sensitivity to light. Kung Eye diagnosis and treats keratoconus at both of its offices in Staten Island, NY and East Brunswick, NJ .