Cornea

Definition

The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, contributing to the eye's ability to focus light. It is a highly organized group of cells and proteins with no blood vessels, receiving its nutrients through tears and aqueous humor.

Related terms

Iris: The colored part of the eye that controls the size of the pupil and thus the amount of light that enters the eye.

Pupil: The opening in the center of the iris through which light enters the eye, whose size is adjusted by the iris to control light entry.

Aqueous humor: The clear fluid between the cornea and lens in the front part of the eye, providing nutrients to these parts as well as maintaining intraocular pressure