"Uncontrollable" is far too much of a generalisation, and doesn't really tell you anything. It doesn't HAVE to be a slippery slope to the inevitable, despite what your eye specialist thinks. Blood pressure is a very significant factor in maintaining microvascular condition, and is often overlooked. My retinas look like a warzone with all the laser I've had, but they are finally stable after a very scary few years. I have no loss of vision whatsoever, and was receiving a very different prognosis just 5 years ago. Prove them wrong!