Sclera

The sclera is the opaque (usually white), fibrous, protective layer of the eye containing collagen and elastic fibers.^[1] In children, it is thinner and shows some of the underlying pigment, appearing slightly blue. In the old, however, fatty deposits on the sclera can make it appear slightly yellow.

Diseases and disorders

There are some diseases that cause partial blindness. These diseases produce a dark vertical line through the eye sight which cause less than 100% visibility.

Additional images

<gallery> Image:Gray875.png|Interior of anterior half of bulb of eye. Image:Gray880.png|The terminal portion of the optic nerve and its entrance into the eyeball, in horizontal section. Image:Gray1206.png|The interior of the posterior half of the left eyeball. </gallery>

External links

Citations

[1] Cassin, B. and Solomon, S. Dictionary of Eye Terminology. Gainsville, Florida: Triad Publishing Company, 1990.

The actual descriptive text portion of the article above (and its Contents menu) are licensed under the GNU Free Documentation License then in effect published by the Free Software Foundation. The text article uses material from http://en.wikipedia.org/wiki/Sclera (retrieval date: 2007-05-27) and is provided "as-is" and without warranty. Permission is granted to copy, distribute and/or modify only the actual descriptive text portion of the article above (and its Contents Box) under the GNU Free Documentation License. A copy of the license is available at: http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License. Any advertisements (or active links not embedded in the actual article) and the layout or selection thereof are excluded from such license.
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