axiom. 1  a self-evident truth that requires no proof. 2  a universally accepted principle or rule. 3  Logic, Mathematics. a proposition that is assumed without proof for the sake of studying the consequences that follow from it.
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Combigan Â® (brimonidine/timolol) is a prescription eye drop. It contains two different active ingredients: an alpha agonist (brimonidine) and a beta blocker (timolol). It is approved to treat high eye pressure in people with chronic open-angle glaucoma or ocular hypertension.t decreases the amount of fluid (known as aqueous humor) the eye produces and increases the rate of drainage. These two effects result in lowered eye pressure. Timolol belongs to a group of drugs called beta-adrenergic blocking agents, more often known as beta blockers.