Okay, this is a review site for aviator sunglasses, but I have to mention the glasses that I wear most of the time - the Oakley M Frame sunglasses. As a triathlete, I can be found on my road bike for many hours during the week. All that time spend on the bike is when I am wearing my pair of Oakley M Frame sunglasses.
The fit of these glasses is perfect for cyclists. When you look down from the top, while the glasses are open, you can see that the curvature of the frame fits the skull perfectly. Not only that, but there is a little indentation around the temples that is where one of your helmet straps will go. With the Oakley M Frame sunglasses there are no pressure points.
The lens of the Oakley M Frame sunglasses is very easy to change. I have three different lenses that I change out based on the light condition at the time of my ride. So, if it is overcast out you can wear an appropriate lens which is completely different than if it was perfectly blue skies and sunny in the middle of the day.
What I also love about the Oakley M Frame sunglasses is that there are so many possibilities. Besides having the lenses available in a wide range of colors, there are five different shapes of lenses. If you wear prescription lenses you can get lenses with Rx implants. The frame itself can either be hinged or non-hinged, based on your preference.
Oakley brags that the Oakley M Frame sunglasses have been worn through more championships than any other sport product (not just sunglasses) on earth. There is a reason why so many elite athletes choose these glasses. They are superior to any other sport glasses.