I am on my 2nd set of prescription safety glasses from WalMart. Full wraparound protection & very comfortable. Very reasonably priced if you get them in single vision, something like $75. I got them for distance only, which I prefer for shooting, but I did put a stick-on bifocal on the left lens, which covers close vision for scoring. The stick-on bifocal lenses came from Amazon for $15.
Like Boggus said, safety eyewear is more about protection than being period correct. After seeing someone take a bit of lead to the eye while wearing very small lenses without side shields, I decided to go for safety rather than appearance.
Holler