Idiopathic amblyopia

Two children without strabismus, anisometropia, or a history of form-vision deprivation who had normal stereoacuity were amblyopic in one eye. The amblyopia responded to occlusion treatment of the sound eye and visual acuity decreased again after cessation of therapy. There is no explanation for this amblyopia. It is possible, however, that binocularly provoked inhibition of the fovea of one eye was conditioned during infancy by an amblyopiogenic condition such as anisometropia. This inhibition may have continued to be triggered by binocular vision in these patients, even though the original obstacle to fusion was no longer apparent.