Southern Illinois University
SSB Index
Nervous Tissue

Muscle Tissue

Skeletal Tissue

Eye, lens

The lens is basically two layers of epithelium. In the front (i.e., toward the cornea) is a simple cuboidal epithelium.  Behind that is an extremely exaggerated simple columnar epithelium.  Each of the columnar cells extends across the entire thickness of the lens and constitutes a lens fiber, packed with lens protein.  Because the lens fibers are so extremely long, this organization can be difficult to visualize microscopically in a mature lens, except at the radial margin of the lens (as shown above). 

It is easier to appreciate the pattern in an embryonic eye, where the lens forms as a "bubble" of epithelium.  The front layer matures as a simple cuboidal epithelium, while the back layer matures into the lens fibers.


Comments and questions:

SIUC / School of Medicine / Anatomy / David King
Last updated:  5 July 2022 / dgk