Does anyone here use prescription lens inserts on any headset? I can't wear contacts, and I'm having issues with my glasses with an Index on, so I was thinking about buying some to avoid needing my glasses with the headset on. 

Although, maybe my main issue isn't related to the glasses. What happens is, my face seems to be a weird shape, so everything can be perfectly sharp when I get the headset in the perfect spot, but then it moves ever so slightly, and everything goes blurry. I don't know if that's just an issue with everyone, or if that's specific to me. The other big reason I wanted to try out inserts is because my glasses get sweaty and fogged up after a while. I didn't even know eyeballs could sweat.