Ethnicity: when both parents are of the same origin, it is listed; when of different origins, presented as paternal/maternal. All families except MOL0091 were of Jewish descent. Age at exams: When more than one examination was performed it is listed in the same row if visual acuities did not change and in consecutive rows if vision has deteriorated. Visual acuities: Best corrected visual acuities (BCVA) were 20/30 or better in all patients except MOL0580–1 and MOL0091–2 whose visual loss was gradual and documented longitudinally in repeated exams. Mutations: when mutations were identified in both alleles it is indicated as mutation/mutation, when a mutation was identified only in one allele: mutation/______, and when no mutations were found it is shown as dashes only: _____/______. *Cone dysfunction/Maculopathy: The following abbreviations are used in description: “M.A” for macular atrophy, “Tr.” for tritanopia, and “↓30Hz” for reduced cone flicker ERG.