Monday, 27 July 2015

Cornea has no blood vessels

Cornea of human eye has no blood vessel..

The cornea is the eye’s outermost layer. It is the clear, dome-shaped surface that covers the front of the eye.



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 (a fluid in the anterior portion of the eye) 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. 

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