If evolution occurs through gradations, the critics say, how could it have created the separate parts of the eye -- the lens, the retina, the pupil, and so forth -- since none of these structures ...

These next parts are really cool, but you can't see them with just your own eyes! Doctors use special microscopes to look at these inner parts of the eye, such as the lens. After light enters the ...

In this video, learn about different parts of the human eye and how our sight works. Follow me please class. We’re here at the optician’s to get a good look at a human eye and find out how it ...

Why do some people need glasses and others don't? Everyone's eyes are a little different — not just the color, but the way they work and how well they see. Sometimes all the parts of the eye don't ...

The blood vessels in the uvea also supply vital nutrients to important parts of the eye, like the retina. There are four main types of uveitis, depending on where the inflammation happens.

When there's an irritant or infection, the blood vessels in the eye swell. This makes them more visible and turns parts of the eye pink or red. Conjunctivitis is an eye condition caused by viruses, ...

Most cancers of the eye and orbit in adults are melanomas, but this cancer starts more often in other parts of the body. The majority of melanomas start in the skin. Melanoma of the eye is much more ...