Human Lens
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Human Lens – I

Homo sapiens

Magnification: 150:1

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Cross-section of a human lens of a human eye.

It is the only transparent tissue in the hu- man body. In the past few years, scientists have determined that this transparency —critical for focusing light— stems in large part from the unique ability of the lens to activate a self-destruct program in its cells that aborts just before completion, leaving empty but sustainable cells that transmit visible rays.

Studies of the lens of the eye not only could reveal ways to prevent cataracts but also might illuminate the biology of Alzheimer’s, Parkinson’s and other diseasesin which cells commit suicide.