Main clinical features
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nyctalopia, with onset varying from early childhood to 20 years of age; gradual decline in vision, characterized by reduced peripheral visual fields followed by reduced visual acuity
fundus autofluorescence (FAF) imaging revealed para-foveal rings of increased autofluorescence with widespread mid-peripheral loss of autofluorescence, which had nummular features in three affected individuals
ERG demonstrated a severe generalized retinal dystrophy with severely reduced or undetectable responses |