A patient presents with sudden onset severe eye pain, blurred vision, and halos around lights. Which assessment finding most strongly indicates acute angle-closure glaucoma?

Appeared in: NCL (Northern Coalfields Limited)-NO

Explanation

Acute angle-closure glaucoma is caused by a sudden blockage of the trabecular meshwork, preventing aqueous humor from draining out of the anterior chamber.
This blockage leads to a rapid, significant, and painful increase in intraocular pressure (IOP), which is the hallmark sign of the condition.
Normal IOP is typically between 10-21 mmHg. In an acute attack, pressures can rise dramatically, often exceeding 40 or 50 mmHg.
This elevated pressure is what causes the severe pain, corneal edema (leading to blurred vision and halos), and puts the optic nerve at immediate risk of damage.

Option A: Conjunctival injection (a red eye) is a common but non-specific sign. It occurs in many conditions, including minor irritations, infections (conjunctivitis), and other types of inflammation. While present in acute glaucoma, it is not the most definitive finding.
Option B: Bilateral lid edema (swelling in both eyelids) is not a typical sign of acute angle-closure glaucoma, which usually affects only one eye. Furthermore, lid swelling is more indicative of allergic reactions, periorbital cellulitis, or systemic issues like kidney or heart failure.
Option D: A pale optic disc is a sign of optic atrophy, which is irreversible damage to the optic nerve. This is a finding in chronic, long-standing, untreated glaucoma, not an acute attack. In an acute event, the nerve is at risk, but pallor develops over time.

Visual 1: Diagram - A cross-section of the eye comparing a normal open angle with a closed or narrow angle, illustrating how the iris blocks the trabecular meshwork.
Visual 2: Infographic - A chart showing the classic signs and symptoms of acute angle-closure glaucoma, highlighting the triad of sudden pain, blurred vision with halos, and a red eye, with elevated IOP as the central cause.

Clinical Relevance

Nursing practice connection: Use the key finding related to Assessment and diagnosis of acute angle-closure glaucoma to guide bedside assessment, documentation, and the next nursing action.
Acute angle-closure glaucoma is an ophthalmic emergency requiring immediate intervention to prevent permanent vision loss.
A nurse's primary role is to recognize the classic symptoms, facilitate prompt measurement of IOP, and prepare to administer prescribed emergency medications like miotics (e.g., pilocarpine), beta-blockers, and systemic agents (e.g., acetazolamide) to lower the pressure.
The patient will require significant pain management and reassurance during the acute episode.

How to Approach the Question

First, analyze the patient's symptoms in the stem: 'sudden onset,' 'severe eye pain,' 'blurred vision,' and 'halos around lights.' This combination is a classic presentation of an acute ocular crisis.
Recognize that these symptoms point strongly to acute angle-closure glaucoma.
Next, evaluate the options to determine which one is the direct cause and most definitive diagnostic marker for this specific condition.
Option A (conjunctival injection) is a symptom but is non-specific.
Option B (bilateral lid edema) is inconsistent with a typically unilateral condition.
Option D (pale optic disc) is a sign of chronic disease, not an acute event.

Concept Tested & Keywords

Concept Tested: Assessment and diagnosis of acute angle-closure glaucoma.
Stem keywords: sudden onset, severe eye pain, blurred vision, halos around lights, acute angle-closure glaucoma
Lead-in keywords: most strongly indicates
Clinical cues: The combination of sudden, severe eye pain with visual disturbances like halos is a classic presentation of an acute glaucoma attack.

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