Final answer:
Timolol is the beta-adrenergic blocker that is used to reduce intraocular pressure, primarily for glaucoma treatment. It works by decreasing aqueous humor production in the eye.
Step-by-step explanation:
The beta-adrenergic blocker used to reduce a client's intraocular pressure is Timolol. Beta-blockers like Timolol work by blocking the beta-receptors in the eye, which reduces the production of aqueous humor, thus lowering intraocular pressure. This is particularly beneficial for patients with glaucoma, a condition characterized by increased intraocular pressure that can lead to optic nerve damage and loss of vision.
Timolol is commonly preferred for this therapeutic effect over other beta-blockers that may have a more general cardiovascular effect, such as metoprolol and propranolol, which are more typically used in the treatment of cardiovascular diseases.