Plumbit my wife has had Diabetic Retinopathy for the past 19 years. Hers was also caught fairly early, but I do remember her first lazier treatment was over 1000 zaps. She had to have a couple of follow up treatments with lazier, but in the last 17 years or so she had not had to have any. Hers was also brought on by being a Juvenile Diabetic. She did suffer some vision loss, but in time the brain will compensate for some of the loss vision by filling in the gaps. At least that's how she explains it. The most important thing is to continue to have regular exams to ensure there is no new leakage. Also keep your blood sugar in check, this is probably the most important thing. She has her eyes checked every 3-4 months.
Good Luck,
Fred