The human eye is an amazing organ. ... Because it's the focal point of your eye, it has more special, ... It protects the delicate structures inside the eye.

The human ear. video The human ear This short film provides a journey into the ear, looking at hearing and balance, plus a real-life example of how the ear helps us to walk. The human eye. video ...

For instance, the human retina contains more than 100 million photoreceptors in each eye, but only about 1 million RGCs, a difference that's hard to overcome — but not impossible.

The conjunctiva, a tissue that covers the white of the eye and the inside of the eyelids, is partially responsible for the production of these tears through the release of mucus.