has material basis in autosomal dominant disease retinitis pigmentosa 96 disease_ontology MIM:620228 DOID:0061104 A retinitis pigmentosa characterized by difficulty with night vision and progressive visual field constriction beginning as early as the third decade of life, but most patients retain good visual acuity into the seventh decade that has_material_basis_in heterozygous mutation in the SAG gene on chromosome 2q37. MIM:620228 RP96 retinitis pigmentosa autosomal dominant inheritance