Editing Color blindness (section)

===Genetic testing===
While genetic testing cannot directly evaluate a subject's color vision ([[phenotype]]), most congenital color vision deficiencies are well-correlated with [[genotype]]. Therefore, the [[genotype]] can be directly evaluated and used to predict the [[phenotype]]. This is especially useful for [[Progressive disease|progressive]] forms that do not have a strongly color deficient phenotype at a young age. However, it can also be used to sequence the L- and M-Opsins on the X-chromosome, since the most common [[allele]]s of these two genes are known and have even been related to exact [[Spectral sensitivity|spectral sensitivities]] and peak wavelengths. A subject's color vision can therefore be classified through [[genetic testing]],<ref name=GHR2019>{{Cite web|url=https://ghr.nlm.nih.gov/condition/color-vision-deficiency|title=Color vision deficiency|last=Reference|first=Genetics Home|website=Genetics Home Reference|language=en|access-date=2019-05-06|archive-date=10 January 2020|archive-url=https://web.archive.org/web/20200110053737/https://ghr.nlm.nih.gov/condition/color-vision-deficiency|url-status=live}}</ref> but this is just a prediction of the phenotype, since color vision can be affected by countless non-genetic factors such as your [[Retinal mosaic|cone mosaic]].