IRL NVGs are actually pretty bad. You basically can not read anything, and the NVGs themselves are only good for looking out (still "frizzles"), but not reading or anything that requires concentration. Asked a US Marine I know, here's a few comments he said:
"If it's shi***and washed out and you can't read anything, then it's probably good lol"
"Playing with the focus is the hard part. IRL if you want to read s**t up close you're better off just taking the NVGs off and using a red light, and to read my clipboard I would have to just take the thing off entirely." Here's some pictures he put of himself using the NVGs while on training exercise (hes a UAV operator). This is him calling a "sparkle" on himself (asking aircraft to put IR laser on him)

