No, hit them with something harder My sparring buddy used to wear glasses while training and sparring, and he never had any problems with them.
So how did the surgery work out? I've met a few that weren't done very well and a few others that loved it--they see better than they used to. How long did it take you to be at the point it "changed your life"? As for me, I wear contacts while training. I wear glasses for just about everything else. I like the contacts because I don't have to spend money replacing glasses every time they break. As have been mentioned upthread, contacts are great with peripheral view. - Ceicei