I drive everyday with one of these: http://www.amazon.com/Third-Eye-Round-Helmet-Mirror/dp/B0012OKAZS/ref=sr_1_7?ie=UTF8&qid=1358345165&sr=8-7&keywords=helmet+

I drive everyday with one of these: http://www.amazon.com/Third-Eye-Round-Helmet-Mirror/dp/B0012OKAZS/ref=sr_1_7?ie=UTF8&qid=1358345165&sr=8-7&keywords=helmet+mirror http://www.amazon.com/Third-Eye-Round-Helmet-Mirror/dp/B0012... I have to stop looking forward to use it, for just a small part of a second, because of different focal distance, different angle of my eyes, limits in the brain part that focus the attention, etc. It actually helps me avoid accidents. I don't see how Google Glasses would be much different to that mirror. I would love to use them for GPS or other related info. Focal distance in tiny screens is either a solved problem, or one being solved by smart people right now.