Long-term eyeglasses deformation is usually caused by eyeball protrusion, myopic lens narrowing effect and orbital changes. 1. Eyeball protrusion: It is mainly due to the growth of eye axis caused by myopia, so the eyeball will protrude outward, which causes a kind of eye deformation due to the pressure of the eye on the tissues around the eye. 2. Myopic lens reduction effect: As myopic lenses are concave lenses, the object seen through concave lenses will become smaller, so the eyes are small through the lenses, and once the glasses are removed, the eyes will look relatively larger, thus visually forming a deformation of the eyes. 3. Orbital changes: both sides of the bridge of the nose through the depression of the glasses, resulting in the phenomenon of flattening, after removing the glasses to give people the whole eye around the contour of the absence of the eyes, thus creating a sense of change in the shape of the eyes. Long-term wearing of eyeglasses appear eye deformation, you can go to the regular hospital for examination, to the doctor for help.