Diabetic retinopathy is a complication of diabetes and the longer the duration of diabetes, the higher the risk. If her diabetes is well controlled (HbA1c <7%) there is a much lower chance of developing this problem. If caught early, treatment is excellent and it should be very manageable. Good luck.
Dear Cristina1676,
Diabetes can affect the retinal vasculature. The doctor is being thorough in having your mother evaluated by a specialist to evaluate whether she has signs of diabetic eye disease, which can be manifest by looking at the back of the eye.
Dr. Feldman
Sandy T. Feldman, M.D., M.S.
ClearView Eye and Laser Medical Center
San Diego, California