SEM of cels that form lens of the eye

SEM of cels that form lens of the eye

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Credit: CNRI/SCIENCE PHOTO LIBRARY

Caption: Scanning electron micrograph (SEM) of the fibre- like cells that form the lens of the human eye. The remarkable transparency of the 4-millimetre thick lens of the eye is due to the absence of nuclei in its cells, & to the crystalline precision with which they are arranged. The zipper-like rows of ball-&-socket joints that lock long lines of these cells together may also play a part. In cross-section lens cells are flattened hexagons, arranged in regular stacks. But the length of lens cells, 10 millimetres, is some 2000 times their thickness of 5 micrometres - which why they are usually described as fibres. Magnification: x970 at 35mm size. Reference: MICROCOSMOS, figure 2.10, page 19.

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Keywords: anatomy, eye, human body, lens, sight, vision, visual sense

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