Diabetic Medicines

I am diabetic for 20 years I spent in the laser treatment in February 2007 I control the blood sugar to see if retinopathy is a permanent cure in allopathy for retinopathy is like a drug? What is the name of the medicine? I think http://en.wikipedia.org/wiki/Diabetic_retinopathy diabetic retinopathy, once it is irreversible. You can block progress by strict blood glucose control. Diabetic retinopathy is often run by laser photocoagulation. Please talk with your ophthalmologist.