Because the cornea is as smooth and clear as glass but is strong and durable, it helps the eye in two ways: Skip to main content Skip to main content. Register for more free articles. ...

The main function of the eyes is enabling people to see. All the parts of the eye work together to allow vision. ... Light passes through the cornea, a dome-shaped structure.

Scleritis is inflammation of the sclera and is predominantly autoimmune. Corneal thinning, astigmatism and peripheral ulcerative keratitis are the common corneal changes following scleritis ...

The cornea is a transparent, dome-shaped layer that covers the front of the eye, contributing up to two-thirds of the eye's focusing power. It consists of five layers, each with its specific function.

Its main function is to help focus light into the lens and pupil. Keratoconus is a progressive condition characterized by a thinning of the cornea that causes it to lose its symmetrical dome shape.