Just curious, it’s pretty sunning in Iraq.
Were the troops issued sun glasses? If so what were they?
If they could use their own personal glasses, are their restrictions to what type?
MtM
Aircrew are in fact issued sunglasses. And they look pretty cool, I might add. 
There’s no real restrictions, as long as they are relatively subdued. The wraparound type is the most popular type.
When I was in Oman, I got goggles with removable tinted inserts. They weren’t as comfortable as sunglasses, but they worked better in blowing dust.
Uniform regulations prohibit “faddish” styles of sunglasses. (At least, last time I checked.) That’s pretty subjective, and I guess the commander gets the last word on what’s acceptable. Personally, if I were commanding troops in Iraq, I wouldn’t hassle someone about their choice of eyewear.
I recall hearing that mirrored sunglasses were forbidden, for the obvious reason that they can give away position by reflecting light.
Other than that, it’s pretty much up to the soldier and their commander.
They mauy prohibit “faddish” sunglasses, but the military has input into the glasses designed and sold, and pilots have definite opinions about what they will and will not wear. They clearly want something stylish and cool, and won’t stand for “dork glasses”. (An affiliated company to mine makes a lot of aircrew glasses.)
USA Today had an article on this last week in the sports section. The sunglasses soldiers wear are manufactured by Oakley, and have a special “anti-laser” coating to them to help protect soldiers eyes, in addition to being tinted. They’re also designed to help improve a soldiers vision in other ways (anti-glare, anti-distortion, etc.) From the way the article was written, the soldiers wouldn’t want to wear civilian issued ones, as they’re vastly inferior.