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Field Expansion for Acquired Monocular Vision Using a Multiplexing Prism.

Jae-Hyun Jung, Eli Peli1

  • 1Schepens Eye Research Institute, Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts *jaehyun_jung@meei.harvard.edu.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|September 1, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a novel multiplexing prism (MxP) device to expand the visual field for individuals with acquired monocular vision (AMV). The device effectively increases nasal visual field, improving mobility and approaching normal binocular vision.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Visual Rehabilitation

Background:

  • Acquired monocular vision (AMV) results in significant visual field loss, impacting patient mobility and safety.
  • Individuals with AMV experience restricted nasal visual fields, increasing collision risks.

Purpose of the Study:

  • To develop and present novel multiplexing prism (MxP) devices for true visual field expansion in AMV patients.
  • To design MxP devices with customized fitting and improved cosmetic appearance.

Main Methods:

  • Developed MxP devices with serrations and specific base-tilt angles to prevent optical aberrations.
  • Calculated MxP dimensions to avoid apical scotoma and monocular diplopia, considering spectacle prescriptions.
  • Verified device effectiveness using perimetric measurements on prototype glasses.

Main Results:

  • Prototype MxP glasses demonstrated effective visual field expansion up to 90° nasally for all AMV patients.
  • No loss of the existing seeing field was observed with the MxP devices.
  • Perimetric measurements confirmed the efficacy of the novel device designs.

Conclusions:

  • The novel multiplexing prism (MxP) integrated into glasses offers significant visual field expansion for AMV.
  • The device has the potential to restore visual field extent comparable to normal binocular vision.
  • Cosmetically acceptable and customized MxP designs show promise for enhancing patient mobility and quality of life.