The retina is a layer of tissue in the back of our eyes. It acts as a screen where images are projected. We need a healthy retina to see things clearly. However, diabetes can slowly damage the retina. According to the WHO, among the 420 million people with diabetes worldwide, 1 in 3 people have diabetic retinopathy, a retinal disease caused by diabetes. People with good vision can experience sudden vision loss. Find out how to protect yourself from this silent killer of eyesight.