The Relationship Between Feline Pupil Size and Luminance

Exp Brain Res. 1985;59(3):485-90. doi: 10.1007/BF00261338.


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Age Factors
  • Animals
  • Body Weight
  • Cats
  • Female
  • Lighting*
  • Male
  • Photic Stimulation
  • Pupil / anatomy & histology
  • Pupil / physiology*
  • Reflex, Pupillary
  • Retina / physiology
  • Sex Characteristics
  • Vision, Ocular / physiology*