Generally speaking, most people with internal strabismus are hyperopic. Internal strabismus is an inward tilt of the eye, so when you do the surgery, you can tilt the internal rectus muscle backward to reduce the strength of the internal rectus muscle, so that the strength of the internal strabismus is reduced, and the eye is easily corrected. In general, the internal strabismus is farsighted and can also be corrected by dilated pupil examination, usually atropine chronic dilated pupil examination, and some of them are corrected by wearing glasses after the examination. So most of this case, first wear glasses to correct, when the correction can not be done surgery.