What is keratoconus?

It is an uncommon non-inflammatory condition of the eye where the usual round dome-shaped cornea (the black central portion of the eye) progressively thins out leading to the development of a cone-shaped bulge.
Keratoconus: symptoms, causes, diagnosis and treatment

The thinning and changes in the shape of the cornea result in scarring. These changes cause lack of corneal transparency, thereby impairing the eye’s ability to focus and ultimately leading to reduced vision.
Keratoconus is common in people of Asian origin and affects one in every thousand people. It is common in teenagers and young individuals. A study reported that the prevalence of keratoconus in central India to be 2300 per 100,000 people.