Cone-Rod Dystrophy 21, also known as retinal dystrophy with early macular involvement, is related to cone-rod dystrophy 16 and fundus dystrophy. An important gene associated with Cone-Rod Dystrophy 21 is DRAM2 (DNA Damage Regulated Autophagy Modulator 2). Affiliated tissues include bone, and related phenotypes are photophobia and nyctalopia