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Related Experiment Videos

Convergence amplitude insufficiency.

J R Brinkley, F Walonker

    Annals of Ophthalmology
    |September 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Convergence amplitude insufficiency, a condition affecting young patients with eye strain, is often missed. Measuring convergence amplitudes is key to diagnosing this common visual issue.

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    Area of Science:

    • Ophthalmology
    • Vision Science
    • Pediatric Optometry

    Background:

    • Convergence insufficiency (CI) is a common binocular vision disorder.
    • Asthenopic symptoms during near work are typical in CI patients.
    • A normal near point of convergence (NPC) can mask CI.

    Observation:

    • A specific subgroup of patients under 20 years old presents with CI symptoms.
    • These patients exhibit diminished convergence amplitudes.
    • Crucially, their NPC remains within normal limits.

    Findings:

    • Convergence amplitude insufficiency (CAI) is proposed as a diagnosis for this subgroup.
    • Ten cases of CAI were studied.
    • CAI is characterized by reduced convergence ability despite a normal NPC.

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    Implications:

    • Routine measurement of convergence amplitudes is recommended for all patients with asthenopic symptoms.
    • This approach can prevent missed diagnoses of CAI.
    • Accurate diagnosis of CAI can lead to targeted visual therapy and improved patient outcomes.