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Related Experiment Videos

Biofeedback of accommodation to reduce functional myopia: a case report

J N Trachtman

    American Journal of Optometry and Physiological Optics
    |June 1, 1978
    PubMed
    Summary

    Biofeedback training effectively reduced functional myopia in a 30-year-old man. This visual training demonstrated rapid learning and generalization, improving unaided vision even in illuminated environments.

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    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Vision Science

    Background:

    • Functional myopia, often linked to accommodative dysfunction, presents a challenge in vision correction.
    • Traditional myopia management strategies may not address the dynamic nature of functional myopia.

    Observation:

    • A 30-year-old male participant underwent a brief biofeedback training protocol targeting accommodative function.
    • Training sessions were short, totaling 34 minutes over seven sessions, conducted initially in a dark environment.

    Findings:

    • The participant demonstrated rapid learning of myopia reduction within minutes during the biofeedback sessions.
    • Despite training in darkness, a generalization effect was observed, with subjective myopia reduction (1 D right eye, 0.50 D left eye) and improved unaided visual acuity (20/50 to 20/30).

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    Implications:

    • Biofeedback offers a potential non-invasive therapeutic approach for functional myopia.
    • The study highlights the plasticity of the accommodative system and the potential for behavioral interventions in vision correction.
    • Further research could explore optimizing biofeedback protocols for broader clinical application in myopia management.