Microphthalmia, Isolated, with Coloboma 6, also known as mcopcb6, is related to isolated klippel-feil syndrome and klippel-feil syndrome. An important gene associated with Microphthalmia, Isolated, with Coloboma 6 is GDF3 (Growth Differentiation Factor 3). Affiliated tissues include retina and eye, and related phenotypes are coloboma and bilateral microphthalmos