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L/M cone ratios as a function of retinal eccentricity
Author(s) -
Knau H.,
Jägle H.,
Sharpe L. T.
Publication year - 2000
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/1520-6378(2001)26:1+<::aid-col28>3.0.co;2-3
Subject(s) - eccentricity (behavior) , cone (formal languages) , function (biology) , retinal , mathematics , ophthalmology , physics , medicine , psychology , biology , algorithm , social psychology , evolutionary biology
Heterochromatic flicker photometry (HFP) was employed to estimate how the human long‐wave sensitive (L) to middle‐wave sensitive (M) cone ratio varies with retinal location in five color‐normal males. Measurements were made at 0°, 25°, and 40° in the temporal retina. The HFP spectral sensitivities were fitted with a linear combination of L and M cone sensitivity functions derived from the Stockman and Sharpe 1 cone fundamentals, according to genotype. For the white (6500 K, 3 log Td) adapting field conditions, the deduced L/M cone ratios of each subject were nearly constant at all measured eccentricities, with individual values ranging from 0.9:1 to 3.4:1. © 2000 John Wiley & Sons, Inc. Col Res Appl, 26, S128–S132, 2001