When I only wore glasses I never wore them when I trained as they flopped around, got sweaty and or steamed up and lacked peripheral vision. I only wore my glasses( I'm nearsighted) at work and always (still do) take them off when at home. But when I got my contacts they were so confortable and made it seem like I had perfect far sighted vision that I got into the habit of wearing them for training.
Especially at Girya as I have to drive there and I need the contacts for driving. I moved my training spot to the back of the studio, behind Tracy's class instead of facing them as I had been thinking that would help with less visual distractions but thought that no contacts might help.