Titlebook: Colour Vision Deficiencies IX; Proceedings of the n B. Drum,G. Verriest Conference proceedings 1989 Kluwer Academic Publishers 1989 Hyperte

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Minor Colour-Vision Defects: Sib-Sib Correlations and Relation to Unique Coloursl trichromatic females from 46 families (40 two-sib, 4 three-sib and 2 four-sib families) between 18 and 28 years of age were tested for minor colour-vision defects (100-hue, Nagel and Pickford-Nicolson anomaloscopes)..A total of 112 abnormal features could be isolated statistically. If we consider

GREG

Color Discrimination and Post-Receptoral Processes in Congenital Color Deficientse individual differences in the temporal properties of color coding which are related to ability to discriminate color. Results of the second experiment suggest that mechanisms mediating chromatic thresholds can be distinguished from those mediating luminance thresholds by their long integration tim

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High Illuminance Color Matching in Anomalous Trichromacyosition monitoring, observers made steady-state color matches as a function of retinal illuminance from 260 to 260,000 td. The standard wavelengths were either 570, 590, or 610 nm, with fixed mixture primaries of 546 and 650 nm. In contrast to normal observers, performance was poor at 570 nm and imp

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Critical Flicker Frequency in X-Chromosome Linked DichromatsF thresholds were obtained for a square-wave-modulated 580 nm stimulus of -0.35 to 4.65 log trolands. CFF increased linearly with luminance but reached an asymptote above 3.0 log trolands. Deuteranopes showed a higher asymptotic CFF than protanopes for all field sizes. The relative spectral sensitiv

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The Effect of Object Size on the Performance of Colour Ordering and Discrimination Tasksr-normal observers was investigated using 3 sizes (0.5°, 2.5° and 10°) of the Farnsworth Panels H16 and D15 and Lanthony’s desaturated D15: the Nagel anomaloscope (0.5° and 2°) and large and small samples of coloured fabrics, cotton threads and paints..Colour normals and anomalous trichromats were a

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