Depends on the severity of the condition. Contact lens fitting can be difficult in patients with KC requiring frequent visits and lens changes but recent advances in the contact lens industry as provided more fitting options. Lastly, when good vision can no longer be attained with contact lenses or intolerance to the contact lens develops, corneal transplantation is recommended. Although this procedure replaces the thinned central portion of the cornea, eyeglasses and contact lenses are often required for maximal visual acuity. Blurring and distortion of vision are the earliest symptoms of Keratoconus.
Symptoms usually appear in the late teens or early twenties.
The disease will often progress slowly for 10 to 20 years, and then usually stop. In the early stages, vision may be only slightly affected, causing glare, light sensitivity and irritation. Each eye may be affected differently. As the disease progresses and the cornea steepness and scars, vision may become distorted. The cornea swells when the elastic part of the cornea develops a tiny crack, created by the strain of the cornea's protruded cone-like shape.