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Organs » Cornea

Cornea

Descriptions of Cornea

Cornea: The transparent part of the eye that covers the iris and the pupil and allows light to enter the inside.
Source: National Institute of Health

Cornea: transparent anterior portion of the outer covering of the eye; it covers the lens and iris and is continuous with the sclera
Source: WordNet 2.1

Cornea : transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior.
Source: CRISP

Article Excerpts about Cornea

The cornea is the clear portion found at the front of the eye and serves to bend light rays.

The cornea is the eye's outermost layer. It is the clear, dome-shaped surface that covers the front of the eye. (Source: excerpt from Facts About the Cornea and Corneal Disease: NEI)

Although the cornea is clear and seems to lack substance, it is actually a highly organized group of cells and proteins. Unlike most tissues in the body, the cornea contains no blood vessels to nourish or protect it against infection. Instead, the cornea receives its nourishment from the tears and aqueous humor that fills the chamber behind it. The cornea must remain transparent to refract light properly, and the presence of even the tiniest blood vessels can interfere with this process. To see well, all layers of the cornea must be free of any cloudy or opaque areas. (Source: excerpt from Facts About the Cornea and Corneal Disease: NEI)