The cornea is the transparent, dome-shaped surface that covers the front of the eye. It plays a crucial role in focusing light onto the retina for clear vision.
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The cornea is composed of five layers: the epithelium, Bowman's layer, stroma, Descemet's membrane, and endothelium.
It is avascular, meaning it does not contain blood vessels; it receives nutrients from tears and the aqueous humor.
The cornea contributes approximately 65-75% of the eye's total focusing power.
Damage to the cornea can result in impaired vision or blindness if not treated properly.
The cornea also serves as a barrier against dirt, germs, and other particles that can harm the eye.