Cone dystrophy 3

Progressive cone dystrophy usually presents in childhood or early adult life, with many patients developing rod photoreceptor involvement in later life, thereby leading to considerable overlap between progressive cone dystrophy and cone-rod dystrophy. Both progressive cone dystrophy and cone-rod dystrophy have been associated with mutation in the GUCA1A gene (Michaelides et al., 2006). Intrafamilial variability in GUCA1A-associated macular disease ranges from mild photoreceptor degeneration to central areolar choroidal dystrophy (CACD), a form of retinal degeneration that primarily involves the macula and is characterized by a well-defined atrophic region of retinal pigment epithelium and choriocapillaris in the latest stage (Chen et al., 2017). [from OMIM]