I have had cataracts removed from both eyes, and later suffered a detached retina, which is a sometime side effect of cataract surgery, eve after all that my eyesight is better today than it was when I was much younger! I have done a lot of welding, and had my fair share of flashes, though probably not as many as someone who welded full time. I asked my specialist if he thought welding could be connected to my early developed cataracts, and he told me that he spent a lot of time repairing welders eyes, and saw no more incidence of cataracts than in the non welding population. Some things you may noticeWith Mig, I try to make sure there is no stray light getting into the inside of the mask, and I have adjusted the darkness level till I can see clearly again, and I dont have much of a problem. I wear glasses, and now weld without them, as my close range sight is better without. The only problem I have is night driving, which I avoid at all costs! Weld away, you will not really know till after it is all done, but take your surgeons advice, and give yourself an easy 6 months after the last Op.