The cause of<unk>  is unclear. Purportedly, there have been some incidents of genetic distribution in a family; however, this does not account for all cases. Maternal viral infections, embryonic trauma, teratogenic environmental exposures or vascular dysgenesis (failure of the embryo to form a satisfactory blood supply) between four and seven weeks gestation are considered possible causes. In an experimental mouse model, change in the expression of a homeobox gene led to similar, but bilateral,<unk>  defects.
Fibular hemimelia
Optokinetic drum
Spotted lunulae
Morning glory disc anomaly
Macrostomia
Acrocephalosyndactylia
Macular hypoplasia
Vitreomacular adhesion