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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 48, Iss. 9 — Sep. 1, 1958
  • pp: 622–626

Some Visual Functions of a Unilaterally Color-Blind Person. II. Binocular Brightness Matches in Various Spectral Regions

EDA BERGER, C. H. GRAHAM, and YUN HSIA  »View Author Affiliations


JOSA, Vol. 48, Issue 9, pp. 622-626 (1958)
http://dx.doi.org/10.1364/JOSA.48.000622


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Abstract

Binocular brightness matches in eight spectral regions, ranging from one having a spectral centroid at 452 mµ to one with a spectral centroid at 681 mµ were determined for a unilaterally dichromatic subject, a young woman with normal color vision in one eye and basically deuteranopic vision in the other. The measurements were made at photopic luminance levels by means of a polarization photometer in which the field of view of each eye subtended 1.8°.

For a report of apparent equality of brightness of the two test fields, the luminance requirements for the field seen by the subject’s color-blind eye exceed those for the field viewed by her normal eye in all but the red spectral regions. The luminance loss varies with wavelength; it is greatest in the green, less in the blue, and even less in the yellow. These selective spectral luminosity losses are maintained over a luminance range of approximately 2.5 log millilamberts. These data confirm earlier findings on selective luminosity losses at threshold for this subject’s deuteranopic eye.

Citation
EDA BERGER, C. H. GRAHAM, and YUN HSIA, "Some Visual Functions of a Unilaterally Color-Blind Person. II. Binocular Brightness Matches in Various Spectral Regions," J. Opt. Soc. Am. 48, 622-626 (1958)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-48-9-622

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