Efficacy and safety of preservative-free anti-glaucomatous eye drops (dorzolamide/timolol) in ocular hypertension and/or glaucoma.

Purpose: This study evaluated the efficacy, safety, and tolerability of a single-dose, preservative-free (PF) Dorzolamide/Timolol combination (Twinzol-SDU).

Methods: A 3-month single-arm, multicenter, prospective cohort study was conducted in Egypt between January 2021 and October 2022 on previously diagnosed and controlled patients with ocular hypertension and/or glaucoma. Efficacy was assessed using the change in intraocular pressure (IOP) after 6 and 12 weeks.