I bought these goggles for my Chem lab but was disappointed when I first put them on; these goggles are huge! They not only cover my eyes, but also my nose, cheeks, and forehead. It feels more like that I'm wearing a mask rather than a pair of goggles.
These goggles fog up (I know description says otherwise) but I have to periodically take it off to get rid of the water mist that blinds me.
I have a 4 hour lab class and by the end of it, the goggles have drilled lines into my cheeks/forhead where it was resting. These marks last for hours.
Conclusion, unless you have HUGE prescription glass and can't find goggles to fit over, don't bother. Get something smaller and more comfortable.