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Bioptic low vision aid: a simple approach

P D Bergenske, T W Raasch

    American Journal of Optometry and Physiological Optics
    |March 1, 1982
    PubMed
    Summary
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    This study details a variable focus telescopic system designed for low vision patients needing to see clearly at multiple fixed distances. The system offers a simple spectacle-mounted solution and includes optical principles for nearpoint telescope power calculation.

    Area of Science:

    • Ophthalmology
    • Optical Engineering
    • Low Vision Rehabilitation

    Background:

    • Individuals with low vision often require specialized optical aids to perform daily tasks.
    • Existing telescopic systems may lack adaptability for varying working distances.
    • Spectacle-mounted devices offer a practical solution for integrating visual aids into daily wear.

    Observation:

    • A patient with low vision required a system to view objects at several distinct near working distances.
    • A need for a readily attachable and adjustable telescopic system was identified.

    Findings:

    • A variable focus telescopic system was designed, specifically for spectacle integration.
    • The design incorporates a straightforward mounting mechanism for existing eyeglasses.

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  • The report analyzes the underlying optical principles and provides a formula for calculating the equivalent power of nearpoint telescopes.

    • Implications:

    • This variable focus system could enhance visual independence and task performance for low vision individuals.
    • The design offers a potentially more versatile alternative to fixed-focus nearpoint telescopes.
    • Further research could explore user-specific adaptations and long-term efficacy of this telescopic system.