The retina is the light-sensitive layer of tissue at the back of the eye. Dr. Robert Steinmetz examines the eyes of Albert Farris, who suffers from advanced macular degeneration. Have a family history of the disease. Smoke a pack or more of cigarettes a day. Have elevated blood cholesterol.
Straight lines appear wavy or crooked.
A blind spot in the middle of the field of vision. The eye is like a camera and the retina is like film inside of the camera. When light hits the retina, a picture is taken. Millions of cells change the light into nerve signals which travel through the optic nerve to the brain. Once the brain interprets the messages, the sight process is completed.