You say your eyes started to bother you "out of nowhere". Does that mean that you were unaware that you had diabetes?
Based on your young age and the current severity of the problem (having already required several complex surgeries), the hard truth is that your long term prognosis for retaining anything close to '
normalNormal saline flush' vision in either eye is low.
It sounds like your current retina doc is treating you aggressively using modern methods, including
Avastin. I don't know that another retina doc will have more to offer, but if you want a second opinion consider an examination at one of the many excellent university-based eye clinics in NYC.