During near point convergence (NPC) testing, what indicates that the break point has been reached?

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Prepare for the Certified Paraoptometric Assistant (CPOA) Exam. Study with extensive flashcards and multiple choice questions with explanations. Enhance your skills and knowledge to succeed.

Multiple Choice

During near point convergence (NPC) testing, what indicates that the break point has been reached?

Explanation:
In NPC testing you’re checking how close the target can get before both eyes can no longer fuse the images into one. The break point is reached when diplopia occurs—that is, the patient sees two images because the eyes can no longer maintain binocular fusion. Eye color change, blink reflex, or headache may happen with near work, but they don’t indicate the loss of fusion. Diplopia specifically signals that the convergence limit has been exceeded.

In NPC testing you’re checking how close the target can get before both eyes can no longer fuse the images into one. The break point is reached when diplopia occurs—that is, the patient sees two images because the eyes can no longer maintain binocular fusion. Eye color change, blink reflex, or headache may happen with near work, but they don’t indicate the loss of fusion. Diplopia specifically signals that the convergence limit has been exceeded.

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