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Dorzolamide HCl (DRZ) ophthalmic drop is one of the most common glaucoma medications which rapidly eliminates after instillation leading to short residence time of the drug on cornea. The purpose of the present study is to develop a pH-triggered in situ gel system for ophthalmic delivery of DRZ for treatment of ocular hypertension. In this study, a 32 full factorial design was used for preparation...