The cornea is the clear front part of the eye.
It covers the Iris (the coloured part of the eye), the Pupil (the black centre of the eye) and the Anterior Chamber (the fluid between the iris and the cornea).
The cornea, with the anterior chamber and its lens (a transparent structure that sends light to the back of the eye). helps to send light to focus on the back of the eye (refraction).
The lens, by changing shape, changes the focal distance of the eye so that it can see objects at various distances.
The Cornea accounts for approximately two-thirds of the eye’s total optical power.