Abstract
The relative sensitivity of infants and adults to luminance modulations of 2.6-cd/m2, 0.3-cycle/deg broadband isochromatic red, green, or blue test gratings was measured with a motion-nulling technique. Optokinetic nystagmus was used as the response measure. Each test grating was pitted against a standard, 2.6-cd/m2, 50%-contrast white grating, and the contrast of the test grating required for a motion null was determined. The results were similar for both age groups. Both infants and adults required approximately 50% contrast in the red and green gratings, but only about 25% contrast in the blue grating, to produce a motion null. Quantitative analysis of the results suggests that a peripheral photopic luminance mechanism, with or without a small scotopic contribution, controls optokinetic nystagmus responses in all subjects under these conditions.
© 1989 Optical Society of America
Full Article | PDF ArticleMore Like This
John E. Clavadetscher, Angela M. Brown, Corlene Ankrum, and Davida Y. Teller
J. Opt. Soc. Am. A 5(12) 2093-2105 (1988)
E. Eugenie Hartmann, Annemarie Succop, Steven L. Buck, Avery H. Weiss, and Davida Y. Teller
J. Opt. Soc. Am. A 10(8) 1835-1840 (1993)
Joel Pokorny, Vivianne C. Smith, and Margaret Lutze
J. Opt. Soc. Am. A 6(10) 1618-1623 (1989)