Macular Dystrophy, Retinal, 3, also known as mcdr3, is related to macular dystrophy, retinal, 1, north carolina type and contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a. An important gene associated with Macular Dystrophy, Retinal, 3 is MCDR3 (Macular Dystrophy, Retinal 3). Related phenotypes are abnormal electroretinogram and reduced visual acuity