Cataracts usually develop in both eyes and develop at different rates. It is an eye disorder caused by increased pressure within the eyeball. If the pressure is not relieved it can result in blindness. It is caused by damage or breakdown of the macula, the part of the retina that provides clear, sharp central vision. It may occur in one or both eyes.
Diabetic retinopathy is a possible complication of diabetes.
It occurs when the retina does not get enough oxygen. Symptoms include clouding of vision and seeing spots. Diabetic retinopathy blinds 400 Canadians every year. Canadian National Institute for the Blind. Diabetes and the Eye .