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Assessment of ocular surface in patients using anti-glaucoma medications (AGM) is rarely a priority for clinicians since glaucoma management targets intraocular pressure and preserves vision. This review summarizes the various adverse effects of topical AGM on the ocular surface and highlights the importance of ocular surface assessment in these patients. A literature search of articles (English only) on the subject matter was conducted focusing on recent articles published in the past 5 years. The use of multiple anti-glaucoma medications in glaucoma patients increases patients’ exposure to the drug and the preservatives present in these medications. Long-term use of these medications has deleterious effects on the conjunctiva, cornea, eyelids, and periocular tissues like trichiasis, entropion, symblepharon, forniceal shortening, punctate keratopathy, non-healing epithelial defects, and pannus. Treatment requires drug withdrawal or substitution by oral or topical non-preserved and less toxic preparations of AGMs. The ocular surface and symptoms can improve if the condition is diagnosed early and after drug withdrawal in over 90% of eyes. However, stopping or changing AGMs can often present with its own unique set of challenges in intra-ocular pressure control which may often need glaucoma surgery in close to 20% of eyes for IOP control. Topical antiglaucoma medications (with their preservatives) can induce severe ocular surface and periorbital changes. Early identification and withdrawal of the offending drug/preservative can help to reverse the changes except in eyes with extensive cicatrization.

Ocular Surface Disease and Anti-Glaucoma Medications: Various features, Diagnosis, and Management Guidelines