I was diagnosed with keratoconus but don't know what that is?

Corneal bulge: The cornea is the window at the front of the eye (in front of the color iris which is inside). Normally it maintains its thickness and curvature. In keratoconus, for unknown reasons, the cornea bulges forward and thins out. It frequently develops an unusual curve for which vision correction can only be done by hard contact lenses. See a corneal specialist for this for prognosis.

Keratoconus: Keratoconus affects your cornea, the clear dome-shaped window at the front of your eye. In keratoconus your cornea becomes weaker and thinner at its centre. This thinning causes it to bulge outwards in an irregular cone shape. This can make your vision blurry and distorted. n the early stages, glasses may help correct vision, but most people need contact lenses and sometimes surgery .