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Related Experiment Videos

Designing half-eye binocular spectacle magnifiers.

G E Fonda1

  • 1Saint Barnabas Low Vision Center, West Orange, New Jersey.

Survey of Ophthalmology
|September 1, 1991
PubMed
Summary
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New spectacle magnifiers feature smaller frames and increased base-in prism for enhanced binocular function. This design improves vision, reduces eye strain during reading, and offers a more cosmetic appearance.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Binocular vision impairments can affect daily activities like reading.
  • Standard spectacle magnifiers may not always provide sufficient optical correction or visual support.
  • The need for effective optical aids for patients with binocular vision challenges is well-established.

Purpose of the Study:

  • To describe a novel design for half-eye spectacle magnifiers.
  • To enhance binocular function and patient compliance through improved optical aid design.
  • To introduce a design that incorporates a base-in prism effect within spectacle magnifiers.

Main Methods:

  • Designing half-eye frames with reduced eye size and interpupillary distance (DBL).
  • Incorporating significant base-in prism effects into the spectacle lenses.

Related Experiment Videos

  • Developing magnifiers with powers ranging from +6.00 D to +14.00 D and prism from 8 to 18 delta base-in.

    • Main Results:

    • The design enhances binocular function during spectacle magnifier use.
    • The new design results in lighter, thinner, and more cosmetically appealing optical aids.
    • The incorporated base-in prism effect alleviates convergence effort for prolonged reading.

    Conclusions:

    • Binocular half-eye spectacle magnifiers with specific design features offer significant benefits.
    • These magnifiers are effective for patients requiring strong powers and prism effects.
    • The design provides a large field of vision and frees both hands, ideal for reading and other tasks.