A type of corneal dystrophy in which the cornea gets progressively thinner. Between five and 14 per cent of those who have the condition have a family history of Keratoconus. It starts with the thinning of the middle of the cornea, then slowly bulges outward to form a rounded cone shape. This produces moderate to severe distortion (astigmatism) and blurriness (nearsightedness) of vision.
![Keratoconus](https://cdn.shortpixel.ai/spai/w_292+q_+ret_img+to_webp/https://eyeacuity.com/wp-content/uploads/2018/12/keratoconus-with-labels-660x488.jpg)