One of the most important aspects of an eye exam is an inspection of the retina, which is the layer of light-sensitive tissue lining the back of the eye. Serving much the same function as the film in a traditional camera, the retina sends signals to the brain that are perceived as images. Because the retina has no nerve endings, retinal conditions and diseases that might compromise vision and cause blindness can develop with little or no warning. To better assess the health of the retina, the eye specialist may use an ultra-wide digital retinal imaging system that captures more than 80 percent of the retina in one panoramic image that can be used as a diagnostic tool. From birth on, the eye exam is the best and only accurate means of detecting disorders so that proper treatment can be received. Regular screening for problems that might require urgent attention has been proven to reduce the incidence of vision loss. The retina is the only place in the body where blood vessels can be seen directly, making it possible to check for signs of high blood pressure and other conditions.