<unk>  is the<unk>  of the<unk> <unk>  and may be either congenital or acquired.<unk>  of the<unk> <unk>  leads to the excess overflow of tears called epiphora.
Nasolacrimal duct obstruction
Lacrimal sac
Oculomotor nerve palsy
Persistent pupillary membrane
Orbital emphysema
Vitreous hemorrhage
Corneal ectatic disorders
Protruding ear