Originally Posted by Wogster

I also prefer a helmet mount, the reasoning is rather simple, I think putting it on and off the glasses all the time, could break off the little plastic clip, and your liable to forget the stupid thing. I have 2 pairs of glasses, two bicycles and ONE helmet, so the helmet is the most logical place for the mirror.

On the point of focusing, you actually don't focus on the mirror, you focus on what is in the mirror, nobody actually cares if the mirror frame is in focus....