title: The genetics of tritan disturbances.
abstract: Tritan (blue-green) colour vision disturbances have been found in 79 individuals in six families, revealing an autosomal dominant mode of inheritance with a wide variability of test results within families. Evidence is presented that it is--in contradistinction to the X-chromosomally inherited red-green defects--incorrect to make a subdivision between dichromasia (tritanopia) and anomalous trichromasia (tritanomaly). On the basis of three small screening series, totalling 1900 individuals, the frequency of tritan disturbances is estimated to be around 2 per 1000. Seven males have been observed carrying both inherited tritan and red-green defects.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003119:Color Perception Tests; D003117:Color Vision Defects / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005799:Genes, Dominant; D008040:Genetic Linkage; D006579:Heterozygote; D006801:Humans; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D010375:Pedigree; D014960:X Chromosome