A nurse is assessing a 68-year-old client who presents to the emergency department with severe eye pain and reports seeing halos around lights, suspected of acute angle-closure glaucoma. Which assessment finding would be most indicative of this emergency condition?
The client presents to the emergency department with severe eye pain and reports seeing halos around lights.
1Gradual loss of peripheral vision over several months
2Painless, progressive vision loss with increased cup-to-disc ratio
3Fluctuating vision with mild eye discomfort during reading
4Sudden onset of severe eye pain with nausea and vomiting✓ 정답
해설
Sudden onset of severe eye pain with nausea and vomiting is most indicative of acute angle-closure glaucoma, an ophthalmologic emergency. Other options describe findings more typical of chronic open-angle glaucoma or other non-emergent conditions.
Core Nursing ExplanationKey Concept Analysis: This question assesses your ability to differentiate between the clinical presentations of acute angle-closure glaucoma (AACG) and chronic open-angle glaucoma (COAG). AACG is a true medical emergency caused by a sudden, complete blockage of the eye's drainage angle, leading to a rapid and dangerous rise in intraocular pressure (IOP). The pathophysiology involves the iris being pushed forward against the cornea, physically blocking the trabecular meshwork where aqueous humor drains. This results in the classic, dramatic symptom cluster.
Answer Rationale: Key Point! The correct answer, "Sudden onset of severe eye pain with nausea and vomiting," is the hallmark triad of AACG. The pain is often described as deep, throbbing, and excruciating. The nausea and vomiting are due to a vagal response triggered by the extreme eye pain and elevated IOP. This presentation, combined with the patient's report of seeing halos around lights (caused by corneal edema scattering light), is pathognomonic for this emergency.
Distractor Analysis:
Watch out for confusion! Option ①, "Gradual loss of peripheral vision over several months," is the classic presentation of chronic open-angle glaucoma (COAG). COAG is often called the "silent thief of sight" because it is painless and progresses slowly.
Option ②, "Painless, progressive vision loss with increased cup-to-disc ratio," also perfectly describes COAG. The increased cup-to-disc ratio is a key ophthalmoscopic finding in COAG, indicating optic nerve damage from chronic pressure.
Option ③, "Fluctuating vision with mild eye discomfort during reading," is more suggestive of presbyopia (age-related farsightedness) or eye strain, not an acute glaucomatous emergency.
Related Concepts: The nursing priority for AACG is rapid intervention to lower IOP to prevent permanent optic nerve damage and blindness. Interventions include administering prescribed osmotic diuretics (e.g., mannitol IV), carbonic anhydrase inhibitors (e.g., acetazolamide IV/PO), and miotic eye drops (e.g., pilocarpine) to constrict the pupil and pull the iris away from the drainage angle. Definitive treatment is often a laser peripheral iridotomy to create a new drainage pathway.
Concept Summary
Condition
Onset & Key Features
Pain
Vision Symptoms
Nursing Implication
Acute Angle-Closure Glaucoma (AACG)
Sudden emergency. Fixed, mid-dilated pupil; corneal edema; red eye.
Severe, deep pain with N/V
Halos around lights, blurred vision
Immediate intervention to lower IOP. Prepare for laser iridotomy.
Chronic Open-Angle Glaucoma (COAG)
Insidious, progressive. "Silent thief of sight."
Painless
Gradual peripheral vision loss (tunnel vision)
Lifelong management with IOP-lowering eyedrops. Patient education on adherence.
Side-by-Side Comparison!
Feature
Acute Angle-Closure Glaucoma (AACG)
Chronic Open-Angle Glaucoma (COAG)
Onset
Sudden (Emergency)
Gradual (Chronic)
Pain
Severe, often with N/V
Typically painless
Pupil
Mid-dilated, fixed, non-reactive
Normal
Cornea
Cloudy/edematous (causing halos)
Clear
Primary Issue
Mechanical blockage of drainage angle
Reduced outflow through trabecular meshwork
Nursing Priority
Rapid IOP reduction to prevent blindness
Lifelong medication adherence to slow progression
Anatomy, Physiology & Pharmacology Points
Anatomy: The anterior chamber angle is where the iris and cornea meet. The trabecular meshwork here is the primary drainage site for aqueous humor.
Physiology: In AACG, the iris bows forward (iris bombe), blocking this angle. Aqueous humor production continues, but drainage stops, causing IOP to spike rapidly (often > 40-50 mmHg; normal is 10-21 mmHg).
Pharmacology:
Miotics (Pilocarpine): Constrict pupil, pulls iris away from angle.
Remember the triad for AACG: Pain, Pupil (mid-dilated), Puke (N/V).
High-Frequency NCLEX Topics
The NCLEX loves to test your ability to distinguish emergencies from chronic conditions. AACG vs. COAG is a classic example. You must know that sudden pain + N/V + visual changes = EMERGENCY requiring immediate nursing action. Expect questions on priority interventions, medication administration (especially eyedrop instillation technique), and patient education for COAG.
Watch Out for Question Variations!
Symptom Identification → Priority Action: "The nurse suspects acute angle-closure glaucoma. Which action should the nurse take first?" (Answer: Notify the provider/ophthalmologist immediately and prepare for emergency interventions).
Medication Knowledge: "Which medication, if administered to a patient with AACG, would be contraindicated?" (Answer: Medications that dilate the pupil, like atropine or antihistamines, as they can worsen the blockage).
Post-Procedure Care: "Following a laser peripheral iridotomy for AACG, the nurse should instruct the client to report which finding?" (Answer: Sudden increase in pain or decrease in vision, which could indicate complications).
Nursing Clinical Practice GuideClinical Scenario: You are the triage nurse in the ED. Mr. Johnson, 68, is brought in by his daughter. He is holding his left eye, visibly distressed, and states, "My eye feels like it's going to explode! I've been throwing up, and I see rainbow rings around every light." His left eye appears red, and the pupil is slightly larger and less reactive than the right.
Nursing Intervention Strategy:
Immediate Assessment & Communication: Quickly assess visual acuity (if possible), pupil reaction, and degree of pain. This is a Key Point!time-sensitive emergency. Immediately notify the physician/ophthalmologist and document the time of onset and symptoms precisely.
Prepare for Rapid Intervention: Anticipate orders for IOP-lowering medications. Have IV access ready for mannitol. Prepare acetazolamide (IV or PO) and ensure the pharmacy sends pilocarpine eye drops promptly.
Medication Administration & Monitoring: Administer medications as ordered in the correct sequence and monitor for effects and side effects (e.g., monitor urine output with mannitol, assess for electrolyte imbalance with acetazolamide).
Patient Support & Education: Keep the patient in a calm, dimly lit environment. Explain procedures simply. After the acute episode is managed, educate about the need for a definitive procedure (laser iridotomy) on the other eye as well, as it is at high risk.
Patient Safety and Precautions:
Contraindications: Never administer mydriatics (pupil-dilating drops) or systemic anticholinergics to a patient with suspected AACG.
Medication Cautions: Mannitol is hypertonic; ensure good IV access to avoid tissue necrosis from infiltration. Monitor for signs of fluid overload or heart failure in susceptible patients.
Key Monitoring: Monitor vital signs, pain level, nausea, and any changes in vision. The goal is a rapid reduction in IOP.
Nursing Procedure & Medication FlowTypical Emergency Medication Sequence for AACG:
Hyperosmotic Agent (Mannitol 1-2 g/kg IV over 30-60 min): To rapidly pull fluid from the vitreous humor. Onset: 30-60 min. Watch out for confusion! Calculate drip rate carefully.
Miotic Eyedrop (Pilocarpine 1-2%): Instill every 5-15 minutes initially to constrict the pupil and open the angle. Use punctal occlusion to minimize systemic absorption.
Beta-Blocker Eyedrop (Timolol 0.5%): To further suppress aqueous production.
A Word from Your Senior Nurse
"Remember, in eye emergencies, time is vision. A patient presenting with the classic triad of severe pain, nausea/vomiting, and visual halos is not having a migraine or a bad stomach flu—they are potentially going blind. Your rapid recognition, accurate assessment, and swift action in notifying the team and preparing for treatment can literally save their sight. On the NCLEX, they test this distinction heavily because in real life, missing it has devastating consequences. Always link the pathophysiology (blocked angle → high pressure) to the symptoms (pain, N/V) to the intervention (lower pressure NOW). That's the kind of critical thinking that makes a great nurse."
Acute Angle-Closure Glaucoma — A sudden, painful increase in intraocular pressure due to blockage of the eye's drainage angle, requiring immediate treatment to prevent blindness.
Intraocular Pressure — The fluid pressure inside the eye. Normal range is 10-21 mmHg. Dangerously high in acute angle-closure glaucoma.
Chronic Open-Angle Glaucoma — The most common form of glaucoma, characterized by a gradual, painless increase in IOP and progressive peripheral vision loss.
Trabecular Meshwork — The eye's primary drainage system for aqueous humor, located at the angle where the iris and cornea meet. Blockage here causes glaucoma.
Laser Peripheral Iridotomy — A laser procedure that creates a small hole in the iris to allow aqueous humor to bypass a blocked drainage angle. It is the definitive treatment for acute angle-closure glaucoma and prophylaxis for the other eye.