Which of the following is true regarding macular degeneration?

AIIMS BBSR SNO - 2019

Medical & Surgical Nursing

Easy

Appeared in: AIIMS BBSR SNO - 2019

Explanation

Macular degeneration specifically damages the macula, the central part of the retina.
The macula is responsible for sharp, detailed, central vision, which is essential for tasks like reading, driving, and recognizing faces.
Consequently, the hallmark symptom of this condition is the loss of central vision, often appearing as a blurry or dark spot in the center of the visual field.

Option B: Wet (exudative) AMD is the less common form, accounting for only about 10-15% of all cases.
Option C: Dry (atrophic) AMD is the most common form of macular degeneration, affecting 85-90% of individuals with the condition.
Option D: The disease affects the macula, a part of the retina located at the back of the eye. The cornea is the transparent outer layer at the front of the eye and is not involved in macular degeneration.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology and characteristics of Age-Related Macular Degeneration (AMD) as background academic context rather than a clinical decision trigger.
Nurses play a crucial role in educating patients to use an Amsler grid at home. Daily monitoring can help detect early changes, such as wavy lines or blind spots, which may signal the progression from dry to the more aggressive wet form of AMD.
Central vision loss significantly impacts patient safety, increasing the risk of falls and impairing activities of daily living like reading medication labels, preparing food, or driving. Nursing care should include safety assessments and referrals to low-vision specialists.
What if? If a patient with stable dry AMD reports a sudden worsening of vision or new distortions, it is a potential medical emergency. The nurse must facilitate an urgent ophthalmology consultation, as this could indicate conversion to wet AMD, which requires immediate treatment with anti-VEGF injections to prevent irreversible vision loss.

How to Approach the Question

First, identify the core concept of the question, which is 'macular degeneration'.
Recall the fundamental characteristics of this disease: the anatomical part affected and the type of vision loss it causes.
Systematically evaluate each option against your knowledge. Ask yourself:
Does it cause central or peripheral vision loss? (It affects the macula, so it's central).
Which anatomical structure is damaged? (The retina/macula, not the cornea).
Which form, wet or dry, is more prevalent? (Dry is far more common).

Concept Tested & Keywords

Concept Tested: Pathophysiology and characteristics of Age-Related Macular Degeneration (AMD).
Stem keywords: macular degeneration, true
Lead-in keywords: Which of the following is true
Negative lead-in flag: false

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