title: A device to assess visual performance with optical aids.
mesh_terms: D003263:Contact Lenses, Hydrophilic / Q000592:standards*; D005139:Eyeglasses / Q000592:standards*; D006801:Humans; D013690:Television; D014787:Vision Tests / Q000295:instrumentation / Q000379:methods*; D014792:Visual Acuity