Abstract

Previously the physical specifications and the psychophysical requirements were presented for six inks from which an illuminant-stable red-green color vision test could be constructed. The test of 17 polychromatic plates was prepared and administered to 100 color blind and 100 normal subjects under illuminants ranging from minus-blue to 14000°K. The present paper reports the results of the evaluation of the test in actual practice. Theoretical expectations have been realized in that the test is illuminant-stable, discriminatory between normals and deficients, properly varied in relative difficulty of individual plates for normals and for color blinds, yielding scores well distributed in terms of the probability function, and with a minimum of overlapping between normals and color blinds.

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References

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  1. Ellis Freeman, "An illuminant-stable color vision test. I," J. Opt. Soc. Am. 38, 532 (1948).
  2. D. Farnsworth and J. D. Reed, A Survey of Methods Used in Administering Pseudo-Isochromatic Test Plates for Color Vision, Color Vision Report No. 3 (Bu. Med. x-260 (Av-148-C), Nov. 6, 1943), p. 1.
  3. I. H. Hardy, G. Rand, and M. Rittler, "A screening test for defective red-green vision," J. Opt. Soc. Am. 36, 610 (1946).

1948

1946

Farnsworth, D.

D. Farnsworth and J. D. Reed, A Survey of Methods Used in Administering Pseudo-Isochromatic Test Plates for Color Vision, Color Vision Report No. 3 (Bu. Med. x-260 (Av-148-C), Nov. 6, 1943), p. 1.

Freeman, Ellis

Hardy, I. H.

Rand, G.

Reed, J. D.

D. Farnsworth and J. D. Reed, A Survey of Methods Used in Administering Pseudo-Isochromatic Test Plates for Color Vision, Color Vision Report No. 3 (Bu. Med. x-260 (Av-148-C), Nov. 6, 1943), p. 1.

Rittler, M.

J. Opt. Soc. Am.

Other

D. Farnsworth and J. D. Reed, A Survey of Methods Used in Administering Pseudo-Isochromatic Test Plates for Color Vision, Color Vision Report No. 3 (Bu. Med. x-260 (Av-148-C), Nov. 6, 1943), p. 1.

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