Adjust the arms at the temple to remedy glasses that slide down your nose or aren't level ... Take care not to bend the actual hinge; place the pliers at the part beyond the hinge, where the arm meets ...

These tell you the size of different parts of that frame. For example, 51-19-145 is the shorthand for a 51mm lens width, 19mm bridge width, and 145mm temple length. But what does that mean? The higher ...