Amblyopia may be caused by several conditions that affect normal visual growth or use of the eyes. Amblyopia can be caused by strabismus, an imbalance in the positioning of the two eyes. Strabismus can cause the eyes to cross in (esotropia) or turn out (exotropia). Sometimes amblyopia is caused when one eye is more nearsighted, farsighted, or astigmatic than the other eye.
Treatment of strabismic or anisometropic amblyopia consists of correcting the optical deficit and forcing use of the amblyopic eye, moreover by patching the good eye, or by instilling topical atropine in the eye with enhanced vision. One should also be wary of over-patching or over-penalizing the good eye when treating for amblyopia, as this can create so-called "reverse amblyopia" in the other eye
Amblyopia, otherwise known as lazy eye, is a disorder of the visual system that is characterize by poor or unclear vision in an eye that is otherwise physically normal, or out of proportion to associated structural abnormalities. It has been predictable to affect 1–5% of the population.