A supplementary technique for balancing refraction.
The customary technique for balancing the refractive (subjective) correction lenses requires the subject to compare the clarity of two images. If there is an inequality in the best acuity attainable for each eye, this technique does not give valid results. An alternate technique is described that does not depend upon maximal acuity for each eye.
D006801:Humans; D007909:Lenses; D012029:Refraction, Ocular / Q000379:methods*; D014792:Visual Acuity