New lacrimal endoscopes have been developed that are thin enough to be threaded in the lacrimal puncti and canaliculi to enable direct and precise visualization of the lacrimal passage. Transcanalicular laser dacryocystorhiostomy can be performed using varient types of laser including the argon , potassium titanyl phosphate (KTP), carbon dioxide , Holmiuim:Yettriiun Aluminum Garnet(Ho:YAG),Neodyium:Yettriiun- Aluminum Garnet (Nd:YAG) and diode laser.