10/23/2026
Keratoconus is a condition that affects the curvature of the cornea and causes it to thin and bulge into a cone-like shape, leading to distorted vision. The cause is unknown, but it usually manifests in adolescence or early adulthood, and can progress over several years. Common symptoms include increasing near- or farsightedness, poor night vision, and sensitivity to light and glare. Treatments range from glasses or contact lenses to surgery, depending on the severity of the condition.