What does the eye see best?
- 1 March 1983
- journal article
- Published by Springer Science and Business Media LLC in Nature
- Vol. 302 (5907), 419-422
- https://doi.org/10.1038/302419a0
Abstract
Our eyes see so much in such varied conditions that one might consider the question posed in the title to be meaningless, but we show here that, within the range that we have been able to test, there is a particular spatiotemporal pattern of light that is detected better than any other. At least two plausible theories of visual detection predict that a stimulus will be seen best (will have greatest quantum efficiency) when it matches the weighting function of the most efficient detector. We have measured quantum efficiency for detecting a wide variety of spatiotemporal patterns using foveal vision in bright light. The best stimulus found so far is a small, briefly exposed circular patch of sinusoidal grating having a spatial frequency of approximately 7 c deg-1, drifting at approximately 4 Hz. We propose that this is the weighting function of the most efficient human contrast detector. We believe this answer to the question is unexpected and may have fundamental implications with regard to the mechanisms of visual perception.Keywords
This publication has 17 references indexed in Scilit:
- Summation of grating patches indicates many types of detector at one retinal locationVision Research, 1982
- Efficiency of Human Visual Signal DiscriminationScience, 1981
- Probability summation and regional variation in contrast sensitivity across the visual fieldVision Research, 1981
- Discrimination at threshold: Labelled detectors in human visionVision Research, 1981
- Parallel visual pathways: A reviewVision Research, 1980
- Mathematical description of the responses of simple cortical cells*Journal of the Optical Society of America, 1980
- Bandwidths of orientation channels in human visionJournal of the Optical Society of America, 1979
- The efficiency of detecting changes of density in random dot patternsVision Research, 1978
- An expansion of a signal in Gaussian elementary signals (Corresp.)IEEE Transactions on Information Theory, 1966
- Definitions of d′ and η as Psychophysical MeasuresThe Journal of the Acoustical Society of America, 1958