The genetics of tritan disturbances

Hum Genet. 1985;69(3):255-62. doi: 10.1007/BF00293036.


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

  • Adolescent
  • Adult
  • Aged
  • Child
  • Child, Preschool
  • Color Perception Tests
  • Color Vision Defects / diagnosis
  • Color Vision Defects / epidemiology
  • Color Vision Defects / genetics*
  • Female
  • Gene Frequency
  • Genes, Dominant
  • Genetic Linkage
  • Heterozygote
  • Humans
  • Male
  • Middle Aged
  • Netherlands
  • Pedigree
  • X Chromosome