Transition lenses in eyeglasses have been around for many years now. The mechanics behind transition lenses is that certain chemicals in the lens interact with UV light from the sun and turn the lenses dark when you go outside and back to clear...

Diabetic retinopathy is an eye condition that affects the retina in people who have diabetes.

The retina is the light-sensitive tissue that lines the back of the eye, and detects light that is then processed as an image by the brain....