Hate to contradict you Dennis, but it is quite well known that retinopathy CAN worsen temporarily when control drastically improves. It is actually common advice given to patients about to start on a pump, which often results in a significant improvement in blood numbers, that things may get worse before they get better. However this is certainly no reason not to improve control, the benefits far outweigh the negatives, although it may take years to realise them!
Also, the role of blood pressure in the health of your retinas is often underestimated. Once changes are first detected, it can be as important as blood sugar in maintaining microvascular health and condition.