MAR 27, 2018 07:41 PM PDT
All About Eyeballs
POSTED BY: Carmen Leitch
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Eyeballs are a special part of our body, with many unique properties. This video discusses what they're made of: collagen. Collagen is a critical structural protein that is one of the major components of connective tissues like skin and tendons; that makes it one of the most abundant proteins in the bodies of many mammals.

The eye has a layered structure. The sclera is the outermost layer, encasing everything except for the cornea. There are several more layers under the cornea, before reaching the vitreous humor. That gel-like substance fills most of the eyeball's volume. At the back of the eyeball is the part that allows us to see: the retina.

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