The Oxford Biblical Studies Online and Oxford Islamic Studies Online have retired. Content you previously purchased on Oxford Biblical Studies Online or Oxford Islamic Studies Online has now moved to Oxford Reference, Oxford Handbooks Online, Oxford Scholarship Online, or What Everyone Needs to Know®. For information on how to continue to view articles visit the subscriber services page.
Signed in as:

Related Content

Related Overviews


More Like This

Show all results sharing these subjects:

  • Science and technology
  • Psychology


Show Summary Details



Quick Reference

Having uniform light intensity, pertaining to visual stimuli in which shapes or forms are defined by variations in colour without any contrasts in lightness. If red and green stripes in motion on a television screen are adjusted so that they are isoluminant, then although the viewer can see that they have changed position from one moment to the next, the sensation of movement is either greatly reduced or entirely eliminated, because information about movement is processed by the colour-blind magnocellular system; and for the same reason, binocular stereopsis and the other binocular and monocular cues used for depth perception do not function with isoluminant stimuli, which invariably appear flat and two-dimensional. Also called equiluminant. See also dark focus. isoluminance n. [From Greek isos equal or the same+Latin lumen light]

Reference entries