Human binocular summation at absolute threshold.
D000293:Adolescent; D000328:Adult; D003623:Dark Adaptation; D004056:Differential Threshold; D005403:Fixation, Ocular; D006801:Humans; D008297:Male; D008433:Mathematics; D008954:Models, Biological; D010775:Photic Stimulation; D011601:Psychophysics; D012160:Retina / Q000502:physiology*; D014785:Vision, Ocular