**Question:** All of the following conditions are contraindicated or likely to worsen in a case of Primary Open Angle Glaucoma, when treated with Timolol maleate 0.5% eye drops, except

A. Angle-closure glaucoma
B. Maniac-depressive disorder
C. Systemic hypertension
D. Anxiety

**Core Concept:** Timolol maleate is a beta-blocker, used as a topical ophthalmic agent to lower intraocular pressure (IOP) in patients with glaucoma or ocular hypertension. It works by blocking beta-adrenergic receptors in the trabecular meshwork, thereby reducing the production of aqueous humor and lowering IOP.

**Why the Correct Answer is Right:** Timolol maleate is indicated for the treatment of glaucoma and ocular hypertension. However, it is contraindicated or can cause significant worsening in patients with angle-closure glaucoma (Option A), as it blocks beta-adrenergic receptors in the iris sphincter, leading to worsening of the narrow angle and increasing the risk of angle closure.

**Why Each Wrong Option is Incorrect:**

**Option B (Maniac-depressive disorder):** Timolol maleate is not associated with any significant effect on psychiatric disorders or mood. The wrong association with maniac-depressive disorder is a clinical misconception and does not apply to ophthalmic use of Timolol maleate.

**Option C (Systemic hypertension):** Timolol maleate has systemic effects due to its lipophilic nature, but its primary action is on the eye, specifically reducing IOP. In a patient with systemic hypertension, the systemic side effects are more concerning, but the ocular benefits may still outweigh the risk, provided the patient is closely monitored.

**Option D (Anxiety):** Timolol maleate does not cause or worsen anxiety. Anxiety might be a concern when prescribing Timolol maleate due to potential side effects, but it does not specifically target or exacerbate anxiety symptoms.

**Clinical Pearl:** Timolol maleate is a safe and effective medication for lowering IOP in patients with glaucoma or ocular hypertension, as long as the appropriate contraindications and precautions are considered, including angle closure glaucoma and severe systemic illnesses with compromised cardiovascular function.