How Should Glasses Fit Behind Ears. The arms should reach all the way to your ears. These are easy things for an optician to correct.
We can also wrap it. If you have plastic frames: The arms should reach to your ears, so you should only feel them on your skin just before the curve.
In either case, the size of the temples may be correct, but the adjustment is not.
Likewise, bend the arms slightly inward if your glasses fit your head too loosely. If temples curve too early, they’ll push the glasses down your nose and apply too much pressure on the bridge, leading to headaches. In either case, the size of the temples may be correct, but the adjustment is not. The eyelashes should at no point touch the frame or lenses.
