I'm surprised to hear that as past doctors have warned me to keep an eye on getting my vitamins because I'm a vegetarian. The other thing I considered is diabetes as I eat too much sugary food. I know it can cause vision problems because it has with my grandmother. This was only a passing thought as other than my more poor diet I couldn't be much less at risk.
Diabetes would be an edge case
At the same time, I've got family with the condition that's
not seeing any (extra -- they were already using glasses and whatnot) deterioration. Do understand it's a known symptom, though.
And a vitamin supplement would be plenty for just about anyone in a modern society -- most wouldn't really
need that to keep their eyes going, but your average multivitamin is basically full assurance that if your eyes are going kaput, it's not your food.
Could be wrong again, but I was under the impression high light levels were more dangerous than low. Where I work they started lowering the light levels to save money and because they claimed it causes less eye stress.
I definitely wouldn't be surprised, heh, but it's also definitely not what the zeitgeist in this area has internalized as true, ha.
Though re: eye stress, there's also particular issues with specific
forms of lighting. Florescent lights are known to cause headaches and additional eye strain, moreso than equal lighting from several other sources, from what I understand. I definitely know I feel better after a day under sunlight or LED/incandescents -- or even just smaller (or at least better concealed, so the bulbs aren't directly visible) florescent stuff than they tend to use in, say, schools -- than I do under ubiquitous florescent conditions. Damned flickery buggers.