At one time I wore soft contact lenses in the shop until the day I raise my face shield and the fellow across the shop started his grinder. The shower of shards sort of nailed my lenses to my eyeball, what pain, and the eye doctor in the emergency room suggested that if I was going to be doing metal work I invest in a pair of safety glasses with safety side shields. So I no longer wear contacts and I do have prescription safety glasses with side shields. I still have to get x-rays of my eyes when I get MRI's taken though because I work with steel. Brass, bronze, silver and gold are OK though. It just ferrous metals that are a problem for MRI's.