“…46 In 1968, The Airlie House Symposium concentrated on the body of knowledge regarding the natural history of diabetic retinopathy. Photocoagulation, metabolic control, and even pituitary ablation 47,48 for the management of severe retinopathy were the key points of the dialogue. In the beginning, both pituitary ablation and photocoagulation were described as "drastic," though not always effective ways of controlling diabetic retinopathy.…”