At this point I would not jump to the conclusion that she is on an irreversible road to blindness. I have a huge number of diabetic patients who have experienced an eye full of blood (vitreous hemorrhage) and, after treatment, have maintained 6/6 vision.
Even if your daughter has advanced diabetic retinopathy
(PDR) with appropriate treatment (laser)and, if necessary, surgery, she should be able to maintain good vision.
So. What is the take home message? Don't despair. This setback doesn't mean that your daughter is destined to end up like her biological father -- going blind and ending up in an early grave.
In the long run this vitreous hemorrhage may very well serve as a wake up call to your daughter and get her on the right path as far as her diabetes is concerned. There is always a silver lining in every cloud if you just look hard enough :)
Let me know how things turn out on Tuesday and, if I can be of any further service, just drop me a note.
Take care and have a good day.