Persistent hyperplastic primary vitreous

A rare ophthalmic disorder characterized by mostly unilateral failure of the regression of a fetal ocular vessel component, the tunica vasculosa lentis and/or the hyaloid system, resulting in an anterior (presenting with microphthalmia, leukocoria, cataract, glaucoma, elongated ciliary processes, shallow anterior chamber, and retrolental fibrovascular membranes, among others) or posterior disease subtype (with microphthalmia, leukocoria, presence of a retinal fold or detachment, hypo- or dysplastic optic nerve, and vitreous membranes and stalk), respectively. Most patients present with a combination of the two subtypes.