As I said above, any protection is better than none, and for $4.97, you can get Berkeley brand wraparound sunglasses at Walmart's sporting goods section. They're UVA and UVB, glare reducing and polarized- sold specifically for looking into water to see fish, a high glare application if ever there was one.
I'm not saying these are the best, but I AM saying everyone can afford $5.00 for sunglasses- and it's dumb not to wear at least these in your growroom. Sure, if you can afford better, get them...
One more point; HID lighting is not the only culprit! CFL puts out plenty of UV light- it's how they work! And LED is also high in UV, and possibly the worst for your eyes out of this whole group. Why? Because the light spectrum is so focused, your eyes remain dilated, letting in even more of the damaging rays.