title: The relationship between feline pupil size and luminance.
abstract: The relationships between luminance and height, width or area of the feline pupil were investigated in awake, normal adult cats whose pupils were photographed over a range of light levels with the aid of electronic flash. The results are compared with previous measurements of pupil width and height in awake animals (Kappauf 1943); and with estimates of pupil width, height and area in lightly-anaesthetised cats (Wilcox and Barlow 1975). The implications of these results for retinal illumination and colour discrimination are discussed.
mesh_terms: D000367:Age Factors; D000818:Animals; D001835:Body Weight; D002415:Cats; D005260:Female; D008029:Lighting; D008297:Male; D010775:Photic Stimulation; D011680:Pupil / Q000033:anatomy & histology / Q000502:physiology*; D012025:Reflex, Pupillary; D012160:Retina / Q000502:physiology; D012727:Sex Characteristics; D014785:Vision, Ocular / Q000502:physiology*