I seem to be on an endless quest for sunglasses that don't cause pain. All of them, no matter what size, seem to find the pressure points behind my ears, sometimes leading to extraordinary pain. In fact, most of the time, I don't wear any eye protection when I ride. I splurged and bought some Oakleys a couple of years ago, which are the best so far and have wonderful lenses, but even these can be problematic.
Does anyone else have this problem? Did you find a way to solve it?