Prevalence of paradoxical anisometropia.

A sample population of patients with a certain degree of antimetropia or mixed anisometropia was selected. Binocular interference or paradoxical dominance was expected in some of them. This interference is such that the "seemingly worse eye" (the eye with the lesser visual acuity) dominates the binocular vision and leads the subject to wear corrective glasses or contact lenses even though the level of visual acuity in the other eye is adequate without correction. This is what we called paradoxical anisometropia. There was no amblyopia or strabismus present. Twenty percent of our subjects manifested some degree of binocular interference.