Subjective Spectrum of Colour Sensation in Colour Defectives:Part 3. Subjective Spectrum of Two Cases Diagnos

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1. An inhabitant, 19 year-old male, of Sado Island, and his sister, 16 years of age, were found to posses all conventional criteria of total colour-blindness. Spectroscopic examination, however, revealed they had more on less rudimentary colour discriminative power.<BR>2. The brother was dichromic, his spectrum being composed of" darkened blue" (Up to 495mμ) and "darkened khahki" (550. 700mμ) with a zone of minimum chromaticity at 495.550mμ. The sister was found trichromit. She saw the spectral range up to 485mμ as "darkened blue". From 485mμ to 500mμ was minimum in chromaticity. A "darkened yellow" began at 500mμ and farther ahead it blended into a " darkened red", which continued up, to 690mμ.<BR>Possibility is indicated that the totally cokiur-blind generally retain rudimentary colour sensation, since previous cases had been diagnosed as such without spectral perusal, such as performed by the present authors.<BR>Hereditary relation was also discussed.
日本民族衛生学会の論文