Spatial frequency and contrast sensitivity test chart

Details Spatial frequency and contrast sensitivity test chart Spatial frequency and contrast sensitivity test chart

1981-07-14

1982-12-28

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

A61B 302

Patent

active

043658733

ABSTRACT:
A chart and method for measuring and quantifying generalized visual sensitivity in terms of contrast sensitivity and spatial frequency response. The chart contains a multiplicity of grating patches whose contrast, in terms of luminance, varies sinusoidally for differing spatial frequencies. The threshold levels of contrast and spatial frequency at which the presence of gratings can be detected accurately defines generalized visual sensitivity.

REFERENCES:
patent: 2385992 (1945-10-01), Jobe
patent: 2463813 (1949-03-01), Shepard
Ronchi, et al. Some Remarks on Ophthalmic Test Types, 1972.
Earle Brown, "Modern Optic" Reinhold Publishing Co., NY, 1965, p. 447.
Green et al., "Effect of Focus on the Visual Response to a Sinusoidal Modulated Spatial Stimulus", J. of Optical Society of America, vol. 55, No. 9, Sep. 1965, pp. 1154-1157.
Watanabe et al. "Spatial Sine-Wave Responses of the Human Visual System" Vision Res., vol. 8, 1968, pp. 1245-1263.
F. W. Campbell et al., "Optical & Retinal Factors Affecting Visual Resolution," J. Physiol., vol. 181, 4/65, pp. 576-593.
D. H. Kelly, "Stimulus Patterns for Visual Research" J. of Optical Society of America, vol. 50, No. 1, 11/60, pp. 1115-1116.
Westheimer, "Modulation Threshold for Sinusoidal Light Distributions on the Retina," J. Physiol., 1960, vol. 152, pp. 67-74.

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