Twenty-seven patients with pancreatic diabetes were investigated for diabetic retinopathy, and 20 of these were matched by age, sex, and duration of diabetes with a group of essential diabetics. The incidence of diabetic retinopathy in the control group was found to be 30% as compared to an incidence of 7.4% in the pancreatic group.
Sevel D, Bristow JH, Bank S, Marks I, Jackson P. Diabetic Retinopathy in Chronic Pancreatitis. Arch Ophthalmol. 1971;86(3):245-250. doi:10.1001/archopht.1971.01000010247001