<unk>  <unk> , also known as<unk>  fetal vasculature (PFV), is a rare congenital developmental anomaly of the eye that results following failure of the embryological,<unk><unk>  and hyaloid vasculature to regress. It can be present in three forms: purely anterior<unk>  tunica vasculosa lentis and<unk>  posterior fetal fibrovascular sheath of the lens), purely posterior (falciform retinal septum and ablatio falcicormis congenita) and a combination of both. Most examples of<unk>  are unilateral and non-hereditary. When bilateral,<unk>  may follow an autosomal recessive or autosomal dominant inheritance pattern.
Persistent hyperplastic primary vitreous
Chronic relapsing inflammatory optic neuropathy
Punctate inner choroiditis
Autoimmune optic neuropathy
Toxic and nutritional optic neuropathy
Arteritic anterior ischemic optic neuropathy
Late congenital syphilitic oculopathy
Acute retinal necrosis