ArticleOptometry and vision science : official publication of the American Academy of Optometry2016
High-Power Prismatic Devices for Oblique Peripheral Prisms.
Article in Optometry and vision science : official publication of the American Academy of Optometry, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Review: Binocular double vision in the presence of visual field loss.Journal of vision · 2024Review
- Influence of prismatic effect due to decentration of optical center in ophthalmic lens.Health science reports · 2023Article
- Oblique multi-periscopic prism for field expansion of homonymous hemianopia.Biomedical optics express · 2023Article
- Current Modalities for Low Vision Rehabilitation.Cureus · 2021Review
- 2017 Charles F. Prentice Award Lecture: Peripheral Prisms for Visual Field Expansion: A Translational Journey.Optometry and vision science : official publication of the American Academy of Optometry · 2020Article
- Multi-periscopic prism device for field expansion.Biomedical optics express · 2020Article
- Design of 45° periscopic visual field expansion device for peripheral field loss.Optics communications · 2020Article
- Current Approaches to Low Vision (Re)HabilitationTurkish journal of ophthalmology · 2019Review
- Field Expansion for Acquired Monocular Vision Using a Multiplexing Prism.Optometry and vision science : official publication of the American Academy of Optometry · 2018Article
- No Useful Field Expansion with Full-field Prisms.Optometry and vision science : official publication of the American Academy of Optometry · 2018Article
- Measuring Pedestrian Collision Detection With Peripheral Field Loss and the Impact of Peripheral Prisms.Translational vision science & technology · 2018Article
- Driving With Hemianopia VI: Peripheral Prisms and Perceptual-Motor Training Improve Detection in a Driving Simulator.Translational vision science & technology · 2018Article
- Multiplexing Prisms for Field Expansion.Optometry and vision science : official publication of the American Academy of Optometry · 2017Article
- The risk of pedestrian collisions with peripheral visual field loss.Journal of vision · 2016Article
- Driving with homonymous visual field loss: a review of the literature.Clinical & experimental optometry · 2016Review
- A Pilot Study of Perceptual-Motor Training for Peripheral Prisms.Translational vision science & technology · 2016Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
purposeHorizontal peripheral prisms for hemianopia provide field expansion above and below the horizontal meridian; however, there is a vertical gap leaving the central area (important for driving) without expansion. In the oblique design, tilting the bases of both prism segments toward the horizontal meridian moves the field expansion area vertically and centrally (closing the central gap) while the prisms remain in the peripheral location. However, tilting the prisms results also in a reduction of the lateral field expansion. Higher prism powers are needed to counter this effect.
methodsWe developed, implemented, and tested a series of designs aimed at increasing the prism power to reduce the central gap while maintaining wide lateral expansion. The designs included inserting the peripheral prisms into carrier lenses that included yoked prism in the opposite direction, combination of two Fresnel segments attached at the base and angled to each other (bi-part prisms), and creating Fresnel prism-like segments from nonparallel periscopic mirror pairs (reflective prisms).
resultsA modest increase in lateral power was achieved with yoked-prism carriers. Bi-part combination of 36Δ Fresnel segments provided high power with some reduction in image quality. Fresnel reflective prism segments have potential for high power with superior optical quality but may be limited in field extent or by interruptions of the expanded field. Extended apical scotomas, even with unilateral fitting, may limit the utility of very high power prisms. The high-power bi-part and reflective prisms enable a wider effective eye scanning range (more than 15 degrees) into the blind hemifield.
conclusionsConventional prisms of powers higher than the available 57Δ are limited by the binocular impact of a wider apical scotoma and a reduced effective eye scanning range to the blind side. The various designs that we developed may overcome these limitations and find use in various other field expansion applications.
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