Abstract

<p>Luminosity functions have been measured for four normal trichromats for three field sizes (1°, 12′, 1.5′) at various levels of retinal illuminance. As the illuminance decreases the reverse Purkinje effect is observed, i.e., there is a decrease in spectral sensitivity of the eye to blue relative to red. The dependence of the spectral sensitivity on field size is not pronounced for the experimental conditions used here. Considerable differences are found between the luminosity functions of the observers. These differences are several times larger than those obtained on repeated curves by any observer. It is shown that the use of an average luminosity function may give very misleading results in some cases.</p><p>A comparison is made with the data obtained by previous workers.</p>

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  1. R. E. Bedford and G. W. Wyszecki, J. Opt. Soc. Am. 47, 564 (1957).
  2. L. C. Thompson, J. Physiol. (London) 106, 368 (1947).
  3. Le Grand3b discusses briefly the reverse Purkinje effect and surveys some of the earlier literature.
  4. Y. Le Grand, Light, Colour and Vision (John Wiley and Sons, Inc., New York, 1957), p. 121.
  5. W. D. Wright, Researches on Normal and Defective Color Vision (Henry Kingston, London, 1946), p. 91, Fig. 55.
  6. S. G. Iurov, Doklady Akad. Nauk S.S.S.R. 47, 271 (1949).
  7. L. C. Thomson, J. Physiol. (London) 112, 114 (1951).
  8. H. G. Sperling and Y. Hsia, J. Opt. Soc. Am. 47, 707 (1957).
  9. S. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953).
  10. H. G. Sperling, Symposium on Visual Problems of Color, National Physical Laboratory, Teddington, Middlesex, September, 1957.
  11. Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. U.S. 38, 80 (1952).
  12. R. A. Weale, J. Physiol. (London) 114, 435 (1951).
  13. I. G. H. Ishak, J. Opt. Soc. Am. 42, 529 (1952).
  14. W. S. Stiles, Optica Acta (Paris) 2, 168 (1955).
  15. International Committee on Illumination, Proc. 8th Session, Cambridge, 1931 (The Cambridge University Press, London. 1932), p. 19.
  16. E. N. Willmer, J. Physiol. (London) 110, 422 (1949).
  17. H. R. Blackwell, report issued by the University of Michigan.

Bedford, R. E.

R. E. Bedford and G. W. Wyszecki, J. Opt. Soc. Am. 47, 564 (1957).

Blackwell, H. R.

H. R. Blackwell, report issued by the University of Michigan.

Graham, C. H.

Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. U.S. 38, 80 (1952).

Grand, Y. Le

Y. Le Grand, Light, Colour and Vision (John Wiley and Sons, Inc., New York, 1957), p. 121.

Hsia, Y.

H. G. Sperling and Y. Hsia, J. Opt. Soc. Am. 47, 707 (1957).

Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. U.S. 38, 80 (1952).

Hurvich, S. M.

S. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953).

Ishak, I. G. H.

I. G. H. Ishak, J. Opt. Soc. Am. 42, 529 (1952).

Iurov, S. G.

S. G. Iurov, Doklady Akad. Nauk S.S.S.R. 47, 271 (1949).

Jameson, D.

S. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953).

Sperling, H. G.

H. G. Sperling, Symposium on Visual Problems of Color, National Physical Laboratory, Teddington, Middlesex, September, 1957.

H. G. Sperling and Y. Hsia, J. Opt. Soc. Am. 47, 707 (1957).

Stiles, W. S.

W. S. Stiles, Optica Acta (Paris) 2, 168 (1955).

Thompson, L. C.

L. C. Thompson, J. Physiol. (London) 106, 368 (1947).

Thomson, L. C.

L. C. Thomson, J. Physiol. (London) 112, 114 (1951).

Weale, R. A.

R. A. Weale, J. Physiol. (London) 114, 435 (1951).

Willmer, E. N.

E. N. Willmer, J. Physiol. (London) 110, 422 (1949).

Wright, W. D.

W. D. Wright, Researches on Normal and Defective Color Vision (Henry Kingston, London, 1946), p. 91, Fig. 55.

Wyszecki, G. W.

R. E. Bedford and G. W. Wyszecki, J. Opt. Soc. Am. 47, 564 (1957).

Other

R. E. Bedford and G. W. Wyszecki, J. Opt. Soc. Am. 47, 564 (1957).

L. C. Thompson, J. Physiol. (London) 106, 368 (1947).

Le Grand3b discusses briefly the reverse Purkinje effect and surveys some of the earlier literature.

Y. Le Grand, Light, Colour and Vision (John Wiley and Sons, Inc., New York, 1957), p. 121.

W. D. Wright, Researches on Normal and Defective Color Vision (Henry Kingston, London, 1946), p. 91, Fig. 55.

S. G. Iurov, Doklady Akad. Nauk S.S.S.R. 47, 271 (1949).

L. C. Thomson, J. Physiol. (London) 112, 114 (1951).

H. G. Sperling and Y. Hsia, J. Opt. Soc. Am. 47, 707 (1957).

S. M. Hurvich and D. Jameson, J. Opt. Soc. Am. 43, 485 (1953).

H. G. Sperling, Symposium on Visual Problems of Color, National Physical Laboratory, Teddington, Middlesex, September, 1957.

Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. U.S. 38, 80 (1952).

R. A. Weale, J. Physiol. (London) 114, 435 (1951).

I. G. H. Ishak, J. Opt. Soc. Am. 42, 529 (1952).

W. S. Stiles, Optica Acta (Paris) 2, 168 (1955).

International Committee on Illumination, Proc. 8th Session, Cambridge, 1931 (The Cambridge University Press, London. 1932), p. 19.

E. N. Willmer, J. Physiol. (London) 110, 422 (1949).

H. R. Blackwell, report issued by the University of Michigan.

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