Originally Posted by
ripponfalls
Sunglasses that sit flush on the bridge of your nose. Any gap (such as found on Ray-bans) will give you an unsual and uncomfortable stream of air into your eyes, and can produce a lot of tears.
On the other hand. I found that glasses that don't have enough air flow fog more and are much hotter. I know that when I changed glasses from my close to the face wraparound sunglasses to my regular glasses with small lenses that I felt 10 degrees cooler (when it was 106F).
It can be a balancing act. I wish my sunglasses had some ports that opened and closed or something, so I could fine tune the airflow for the conditions.