Pre-proliferative retinopathy is when some micro aneurisms can be seen in an eye scan. It is a sign that there are some blockages there but it has not got to the point where new blood vessels are being made. New blood vessels tend to be fragile and burst. This is 'proliferative retinopathy' and needs to be treated. I had a few aneurisms for some time, but it was stable. After bringing my blood glucose down, they went away completely. My eye scans are now completely clear.