Much truth here.
I used to work in a production welding facility. We had "safe zones" where people in the facilities did not have to wear safety gear such as boots, glasses etc. They were far enough away from the action for it not to be an issue, and normally these were for plant tours and the like.
However, we tended to have design revision meetings in the safe zones, and I could tell that the flash was having an effect. I took to wearing clear safety glasses regardless of where I was on the floor. (blocks about 98% of UV)
One day there was a very lengthy meeting in those spots. The next day, 2 of the guys I was meeting with had flash issues (long term exposure over the previous day, not just a single flash up close) and I was 100% fine. We were probably in that area for about 2 hours straight.
A 110v machine isn't too intense, but even then I wear safety glasses under my welding mask, and anytime I am welding, even if it's a quick tack with my eyes closed.