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Aim: Systemically administered angiotensin Ⅱ receptor blocker, losartan, has been shown to reduce intraocular pressure (IOP) in animals and human.The aim of the current study was to compare the ocular hypotensive effect of topical losartan in normotensive and steroid-induced ocular hypertensive rats.Methods: Ocular hypertension was developed in normotensive Sprague Dawley rats by topical instillation of dexamethasone 0.1%, 2 times daily for 36 d.The rats that developed more than 25% rise in IOP were considered ocular hypertensive.