Amblyopia (aka lazy eye) occurs when the vision of one eye is significantly better than the other eye, and the brain begins to rely on the better eye and ignore the weaker one. Amblyopia affects 4% of the population and is clinically diagnosed when the refractive error of one eye is different than the other eye. The management of amblyopia involves correcting of significant refractive errors of the eye and using techniques to strengthen the weaker eye.