February 1989
Volume 30, Issue 2
Free
Articles  |   February 1989
A new test of luminous efficiency for babies.
Author Affiliations
  • D Maurer
    Department of Psychology, McMaster University, Ontario, Canada.
  • T L Lewis
    Department of Psychology, McMaster University, Ontario, Canada.
  • P Cavanagh
    Department of Psychology, McMaster University, Ontario, Canada.
  • S Anstis
    Department of Psychology, McMaster University, Ontario, Canada.
Investigative Ophthalmology & Visual Science February 1989, Vol.30, 297-303. doi:
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      D Maurer, T L Lewis, P Cavanagh, S Anstis; A new test of luminous efficiency for babies.. Invest. Ophthalmol. Vis. Sci. 1989;30(2):297-303.

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Abstract

We used the minimum motion method devised by Anstis and Cavanagh (1983) to measure the luminous efficiency of red and green and of yellow and blue for "normal" 1- 3-month-old babies and for one 3-month-old boy destined to be color-deficient because of a deutan mother. Subjects watched a display which created apparent motion, the direction of which depended on the relative luminance of the colors. To determine the equiluminant points, we observed the optokinetic nystagmus elicited by the display as the relative luminance of the colors was varied. The equiluminant points of the normal mothers and their infants were similar to each other but different from those of the deutan mother and her son. Our new method demonstrates the early maturation of input from red and green cones into achromatic pathways. It can also be used to identify some color-deficient infants.

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