What is keratoconus?
The cornea is the transparent part which covers the eye and through which light enters. A normal cornea is shaped like a perfectly round ball and is made of collagen fibres which give the cornea its structure and firmness.
Keratoconus is a progressive corneal abnormality, specifically affecting these collagen fibres. The cornea gradually becomes thinner and changes shape from convex to pointed (conic).
Progressive thinning of the cornea leads to a bulging eye with irregular astigmatism (oval shaped eye) and increasing myopia (short-sightedness) as a result.
In most cases (80-90%), both eyes are affected, but a difference in severity between both eyes is common (bilateral asymmetric disorder).
Keratoconus usually develops around puberty up to the age of about 45 years and is more common in men than in women.
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