Bietti Crystalline Corneoretinal Dystrophy, also known as bietti crystalline dystrophy, is related to macular holes and peripheral retinal degeneration. An important gene associated with Bietti Crystalline Corneoretinal Dystrophy is CYP4V2 (Cytochrome P450 Family 4 Subfamily V Member 2), and among its related pathways/superpathways are Fatty acid metabolism and Metapathway biotransformation Phase I and II. Affiliated tissues include retina and eye, and related phenotypes are visual impairment and nyctalopia