Clinical Study of Lacrimal Drainage Obstruction Diseases Using Dacryoendoscopy
Lacrimal Duct Obstruction
About this trial
This is an interventional treatment trial for Lacrimal Duct Obstruction focused on measuring Lacrimal Duct Obstruction, Dacryoendoscopy, Dacryoplasty
Eligibility Criteria
Inclusion Criteria: (1) confirmed diagnosis of nasolacrimal duct obstruction or stenosis, based on dacryoendoscopic examination with or without radiologic confirmation on dacryocystogram; (2) recurrent or persistent and symptomatic epiphora; (3) follow-up of longer than 6 months after removal of the silicone stent. Exclusion Criteria: (1) congenital or traumatic lacrimal duct obstruction; (2) previous acute dacryocystitis; (3) facial nerve palsy; (4) lower eyelid or punctal malposition or laxity of sufficient severity to contribute to epiphora; (5) previous dacryocystorhinostomy; (6) incomplete medical records.
Sites / Locations
- Tianjin Eye HospitalRecruiting
Arms of the Study
Arm 1
Arm 2
Arm 3
Active Comparator
Experimental
Experimental
group A
group B
group C
group A higher nasolacrimal duct obstruction
group B: lower nasolacrimal duct obstruction
group C: nasolacrimal duct stenosis