I worked for years! My vision has been fine. I do have migraines, which apparently 56 percent of visual snow "sufferers" do, too. Migraines make it hard to see and the light that they present in the eye is often picked up by the light collectors (cones?) And so a visual aura can be longer and more daunting. As I reported before, my vision was always better than 20/20 corrected, so I don't see that it would necessarily be a hindrance to a job. BUT, everyone is different! So, you will have to do what is right for you.