Located on the inside back wall of your eye, the retina is a thin layer of tissue which contains millions of nerve cells that receive and process the visual input and relay the information to the brain via the optic nerve. Therefore, it serves as a major component of the visual pathway. Essentially, the retina performs the same function as the film in a camera. Diseases such as Diabetes and Macular degeneration can adversely affect the health of the retina causing patients to lose their vision. It is essential to have a dilated eye exam if you are at risk of developing any retinal disorder.