Closed Dacryointubation vs Bicanalicular Intubation for Proximal Tear Duct Obstruction

Inclusion Criteria: * Patients over 18 years of age * Patients with stenosis and incomplete obstruction of the upper lacrimal duct with epiphora \> 2 on the Munk scale who have not previously undergone surgery on the affected tear duct * Patients who may undergo general anesthesia and sedation * Patients who are able to present and continue follow-up for the duration of the study * Acceptance to participate in the study by signing an informed consent Exclusion Criteria: * Patients with ocular surface involvement affecting the upper lacrimal duct, such as blepharitis with tear point epithelialization * Patients with lacrimal point malposition and/or eyelid malposition due to entropion or ectropion * Patients with congenital or acquired obstruction of the lower lacrimal duct * Patients with a history of facial paralysis * Patients with systemic inflammatory disease such as scarring pemphigoid or Steven Johnson * Patients in whom tumour involvement of the lacrimal duct is suspected * Patients with reflex tear hypersecretion due to ocular surface involvement or other causes. * Pregnancy and breastfeeding * Active infection, eye trauma, history of facial trauma with broken bones of the nose, or history of sinus surgery.