Pupillary distance of each person is in accordance with the actual distance measurement, and so it would be appropriate for eyeglasses frame selection. If there is an error from the pupil, the pupil can cause deviation from the lens optical center position. Frames direct impact on the appropriate vision correction.
Pupil from the smaller, more difficult to select glass frame, especially wide or rectangular face, it is very difficult to select eyeglasss frames. The best selection of glasses is transparent bridge.