Whether you just get your new glasses or have wear them for a long time, the frames may pinch your nose, slide out of place or simply appear crooked. Except taking them to an optometrist for an adjustment, you can do it yourself by following these instructions.
Stand in front of a mirror and look straight ahead, make sure that the middle of the lenses is level with the center of your eyes. Check for the fit and make some adjustments properly.
Lay your eyeglasses upside down on a flat surface to ensure both of the temple arms rest evenly. If not, you should level the temple arms or the earpieces.