Wednesday, June 1, 2016

How many eyelids do horses have?

Three. Like a number of other animals, horses have nictitating membranes, a third eyelid which is transparent and can protect the eye while still allowing some visibility. This means horses can blink without actually visibly blinking. It helps protect a horse's very large eyes from trauma. Unfortunately, horses are very prone to cancer of the third eyelid, which can result in needing to remove it.

1 comment:

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