Diabetes is a multisystem disease that has effects on the end organs of the body, which includes the eyes. Diabetic retinopathy, glaucoma and macular edema are some diabetic eye complications which are the greatest cause of blindness in America. Warning signs of eye problems are changes in vision, involving blurring, flashers, floaters and reduction in sight. Treatment with laser or surgery is only effective in early stages of the eye disorders. These eye diseases are suspected in diabetics necessitating yearly eye checks by an ophthalmologist.