The disease is characterized by lack of color vision followed by symptoms such as photophobia, nystagmus, and low visual acuity.49 Multiple genes related to achromatopsia have been identified,49 of these genes, the cyclic nucleotide-gated channel subunit beta 3 (CNGB3) is the most prevalent one followed by CNGA3, for which more than 40 different pathological mutations have been identified.50–52. Here, CNGB3 is linked to Nystagmus.