Lacrimal drainage system -anatomy Common canaliculus Punctum Canalicuus (8 mm) 8 mm -Amputls 2 mm Lacrimal sac (10 mm) 12m Middle turbinate Nasolacrimal Ampulla (2 mm duct (12 mm) Common canaloulus Valve of Hasner manmy te lcimal ecrymn byChne 2007E Lacrimal drainage system - anatomy