There is also a very simple solution for making sure your helmet doesn't interfere with your glasses
Wot he said... plus you get the fun of playing 'where did my glass go?' every time you take your helmet off.. it's great!!Helmet on first and fastened, followed by glasses/sunglasses
I wear helmet over glasses, it works for me
Rule#37 'The arms of the eyewear shall always be placed over the helmet straps.The rules state the glasses on top of helmet strap.
Don't put your glasses down your underpants?There is also a very simple solution for making sure your helmet doesn't interfere with your glasses