title: Unidirectional, bidirectional and random growth of embryonic optic axons.
mesh_terms: D000818:Animals; D001369:Axons / Q000502:physiology*; D002642:Chick Embryo; D009900:Optic Nerve / Q000196:embryology*; D012160:Retina / Q000166:cytology / Q000196:embryology*