Wearing glasses can change your eye shape. The eyeballs of people who do not wear glasses can turn in a wide area, the muscles around the eyes can have a movement, then become muscular. But for the people who wear glasses, the movement of their eyes is limited in the area confined by glasses. The eyeballs can not have a completely movement. So there is only a part of muscle has exercises, and then become muscular, but the other part of muscle does not have movement, this difference cause the deformation of your eyes. In order to see things through glasses, the eyeballs gradually protrude forward to have a larger perspective and see a broader range, so your eyes shape changes.