Tom, bad luck on the retinopathy, and laser's no fun either eh? I started receiving laser treatment aged 31 (10 years ago), but I'm happy to report that it was enough to kick me in the behind just when I needed it. I had barely tolerated diabetes for years, and despite some quite amazing (good) blood numbers every time I visited clinic, the damage was already done. I've had about 6,000 hits on each retina, but none for a while and they appear to have stabilised, finally.
Couple of things to note: Firstly I always say this in response to any post involving a microvascular complication - good blood pressure control is vital in minimising further damage, my team reckon it's more important than blood sugar control once deterioration has started, although clearly don't let your bg levels slip! Secondly, the eyes seem to take much longer to settle down than other organs/functions, certainly did with me and the others I speak to.
I've been taking Vitamin C (1000mg) once a day for the last 6 months, there's been some interesting research and results on it's efficacy in assisting microvascular repair. And I haven't had a cold either!