1, probing intubation: the nasolacrimal duct can be enlarged by repeatedly probing and gradually increasing the probe, which is effective for a few mild or fibrin adhesive blockages, but the scar is difficult to fix.

2. Obstruction incision: There are various incision methods, such as special knife incision, electrocoagulation or electrolysis, and retrograde incision of obstruction from the road or nose, and the results are not satisfactory.

3. Operation of nasolacrimal duct: After probing and expanding the nasolacrimal duct, the inner diameter was 1. 5-3 mm prosthetic tube.

4, dacryocystorhinostomy: The most ideal way of lacrimal sac obstruction is dacryocystorhinostomy.

5. Laser dacryocystoplasty: Using laser to open the narrow obstruction of lacrimal canaliculus, common lacrimal duct or nasolacrimal duct, combined with drug perfusion, this surgical method can restore the physiological channel of lacrimal duct.