Patients taking a combination of topical antiglaucoma medications showed significantly increased risk of developing lacrimal drainage system obstruction. Both total and upper obstruction was significantly more frequent in patients on topical antiglaucoma medications.

Reliability of the new ELP grading makes it a recommendable option for use in the clinic and comparing reports on ELP pathologies.

Although punctum and canaliculus are the main anatomical sites of LDSO associated with topical AGM, common canaliculus and nasolacrimal duct separately or in association with punctum and canaliculus may also be involved.