Visual acuity.
D000065:Accommodation, Ocular; D000367:Age Factors; D000550:Amblyopia; D000818:Animals; D005133:Eye Movements; D006801:Humans; D008027:Light; D012029:Refraction, Ocular; D012160:Retina / Q000502:physiology; D014787:Vision Tests; D014785:Vision, Ocular / Q000187:drug effects; D014796:Visual Perception