Field Expansion for Acquired Monocular Vision Using a Multiplexing Prism

Optometry and Vision Science : Official Publication of the American Academy of Optometry
Jae-Hyun Jung, Eli Peli

Abstract

Acquired monocular vision (AMV) is a common visual field loss. Patients report mobility difficulties in walking due to collisions with objects or other pedestrians on the blind side. The visual field of people with AMV extends more than 90° temporally on the side of the seeing eye but is restricted to approximately 55° nasally. We developed a novel field expansion device using a multiplexing prism (MxP) that superimposes the see-through and shifted views for true field expansion without apical scotoma. We present various designs of the device that enable customized fitting and improved cosmetics. A partial MxP segment is attached (base-in) near the nose bridge. To avoid total internal reflection due to the high angle of incidence at nasal field end (55°), we fit the MxP with serrations facing the eye and tilt the prism base toward the nose. We calculated the width of the MxP (the apex location) needed to prevent apical scotoma and monocular diplopia. We also consider the effect of spectacle prescriptions on these settings. The results are verified perimetrically. We documented the effectivity of various prototype glasses designs with perimetric measurements. With the prototypes, all patients with AMV had field-of-view expansion...Continue Reading

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Sep 1, 2018·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Jae-Hyun Jung, Eli Peli

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Citations

Sep 1, 2018·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Jae-Hyun Jung, Eli Peli
Sep 1, 2018·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Bradley Dougherty
Oct 6, 2020·Biomedical Optics Express·Eli PeliJae-Hyun Jung
Aug 29, 2020·Translational Vision Science & Technology·Jae-Hyun JungEli Peli
Oct 16, 2020·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Eli Peli
Oct 12, 2021·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Jae-Hyun JungEli Peli

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