Retinitis Pigmentosa 38, also known as rp38, is related to macular dystrophy, dominant cystoid and retinitis pigmentosa 74. An important gene associated with Retinitis Pigmentosa 38 is MERTK (MER Proto-Oncogene, Tyrosine Kinase). Affiliated tissues include retina and eye, and related phenotypes are progressive visual loss and nyctalopia