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Progressive bifocal chorioretinal atrophy
Progressive bifocal chorioretinal atrophy (PBCRA) is an early-onset chorioretinal dystrophy characterized by large atrophic macular and nasal retinal lesions, nystagmus, myopia, poor vision, and slow disease progression.
It has been described in two large families.
Transmission is autosomal dominant and the causative gene has been mapped to a region on chromosome 6q, close to the macular dystrophy retinal 1 (MCDR1) locus.