has part has part characteristic of inheres in has modifier Abnormal vitreous humor morphology Remnants of the hyaloid vascular system Persistent posterior foetal fibrovascular sheath of the lens Persistent posterior fetal fibrovascular sheath of the lens UMLS:C0266568 Persistent hyperplasia of primary vitreous Persistent tunica vasculosa lentis HP:0007968 Persistence of the hyaloid artery, which is the embryonic artery that runs from the optic disc to the posterior lens capsule may persist; the site of attachment may form an opacity. The hyaloid artery is a branch of the ophthalmic artery, and usually regresses completely before birth. This features results from a failure of regression of the hyaloid vessel, which supplies the primary vitreous during embryogenesis and normally regresses in the third trimester of pregnancy, leading to a particular form of posterior cataract. Congenital retinal septum SNOMEDCT_US:44647001 Persistent hyperplastic primary vitreous SNOMEDCT_US:69927002 Persistent foetal vasculature Persistent fetal vasculature Persistent hypertrophic primary vitreous SNOMEDCT_US:314270008 persistence abnormal hyaloid artery