Table 8.

The risk classification of lacrimal drainage disorders and surgeries

Level A	Level B	Level C
1. Congenital Dacryocystocele with airway compromise 2. Lacrimal Abscess 3. Pediatric Acute Dacryocystitis 4. Acute lacrimal drainage trauma (canalicular lacerations, NLD injury in complex facial trauma) 5. Lacrimal Sac Malignancy (biopsy proven or suspected) including locally advanced disease with features of orbital or intranasal extension.	1. Inflammatory secondarily acquired nasolacrimal duct obstruction (SALDO) with exacerbations (ex - autoimmune disorders) 2. Infectious canaliculitis 3. Post-traumatic SALDO without complex facial trauma 4. Biopsy proven benign lacrimal sac mass 5. Stent extubation. 6. Idiopathic canalicular inflammatory disease (ICID) 7. Lacrimal sac diverticulitis	1. Primary Acquired Nasolacrimal Duct Obstruction (PANDO) (exceptions in level A) 2. CNLDO (exceptions in levels A and B).