Stereoscopic acuity and horizontal angular distance from fixation.
D000221:Adaptation, Ocular; D003623:Dark Adaptation; D005403:Fixation, Ocular; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology; D014785:Vision, Ocular; D014792:Visual Acuity; D014794:Visual Fields