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Cornea
Pronunciation
Definition 1
The transparent part of the eye that covers the iris and the pupil and allows light to enter the inside. (NCI Dictionary)
Definition 2
A dome-shaped, transparent, avascular tissue covering the front of the eye. It is composed of five layers: squamous epithelium, Bowman's membrane, stroma, Descemet's membrane, and endothelium. Refraction of light contributing to eye's focusing ability is its characteristic function. It contains unmyelinated nerve endings which are responsible for the high sensitivity of the tissue. (NCI Thesaurus)
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