Originally Posted by
AndreyT
What exactly do you mean by "prescription glasses"? Regular glasses or cycling-specific glasses with prescription lenses in them?
Regular glasses should be worn under straps, no question about it, simply because the temples of such glasses are thin and straight. They not designed to be worn over anything.
Cyclic-specific frames are a different story entirely. Cyclic-specific temples are beefy and curved. The whole purpose of the curvature is to facilitate wearing over the straps.
This makes sense. As someone without regular glasses, I wear cycling glasses outside, mainly to make it easier to remove and reinstall them with one hand to wipe sweat off my brow while riding. It's a little more fiddly to do if the arms are under the straps.