Retinitis Pigmentosa 91, also known as rp91, is related to benign concentric annular macular dystrophy and color blindness. An important gene associated with Retinitis Pigmentosa 91 is IMPG1 (Interphotoreceptor Matrix Proteoglycan 1). Affiliated tissues include eye and bone, and related phenotypes are macular dystrophy and dyschromatopsia