In keratoconus, the cornea becomes thin and cone-shaped. Keratoconus literally means a cone-shaped cornea. This shape prevents light from focusing in the eye properly. As the disease progresses the cone becomes more pronounced, causing vision to become blurred and distorted. Because of the cornea’s irregular shape, patients with keratoconus are usually very nearsighted and have a high degree of astigmatism that is not correctable with glasses.
Keratoconus is usually diagnosed in patients as young as their 20′s. For some, it may advance over several decades, for others, the progression may reach a certain point and stop. Tests can provide your eye doctor with details about the cornea’s shape and is used to detect and monitor the progression of the disease.