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Auteur Eli Peli
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche2017 Charles F. Prentice Award Lecture: Peripheral Prisms for Visual Field Expansion: A Translational Journey / Eli Peli in OVS : Optometry & Vision Science, vol. 97, 10 (Octobre 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 10 (Octobre 2020)
Titre : 2017 Charles F. Prentice Award Lecture: Peripheral Prisms for Visual Field Expansion: A Translational Journey Type de document : article de périodique Auteurs : Eli Peli Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:D:Dépistage visuel:Dépistage visuel / classification
[Thésaurus Mesh]Rééducation et réadaptation
[Thésaurus Mesh]Thérapeutique
[Thésaurus Mesh]Vision oculaire
[Thésaurus HELB]:Optique:basse vision
[Thésaurus HELB]:Optique:PrismeRésumé : ABSTRACT: On the occasion of being awarded the Prentice Medal, I was asked to summarize my translational journey. Here I describe the process of becoming a low-vision rehabilitation clinician and researcher, frustrated by the unavailability of effective treatments for some conditions. This led to decades of working to understand patients' needs and the complexities and subtleties of their visual systems and conditions. It was followed by many iterations of developing vision aids and the techniques needed to objectively evaluate their benefit. I specifically address one path: the invention and development of peripheral prisms to expand the visual fields of patients with homonymous hemianopia, leading to our latest multiperiscopic prism (mirror-based design) with its clear 45° field-of-view image shift. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Effects of Perceptual-motor Training on Collision Judgments with Peripheral Prism Expanded Vision / Kevin E. Houston in OVS : Optometry & Vision Science, vol. 99, 12 (Décembre 2022)
[article]
in OVS : Optometry & Vision Science > vol. 99, 12 (Décembre 2022)
Titre : Effects of Perceptual-motor Training on Collision Judgments with Peripheral Prism Expanded Vision Type de document : article de périodique Auteurs : Kevin E. Houston ; Eli Peli ; Gang Luo ; Alex R. Bowers ; Russell L. Woods Année de publication : 2022 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:H:Hémianopsie:Hémianopsie / thérapie
[Thésaurus Mesh]Hémianopsie
[Thésaurus Mesh]Orthoptie
[Thésaurus HELB]:Optique:PrismeRésumé : SIGNIFICANCE: Peripheral prisms (p-prisms) improve blind-side detection of hazards in hemianopia by shifting the image of the hazard into the intact visual field. Collision judgments can be made accurately after detection by using a gaze shift to fixate the hazard in the prism-free portion of the lens, but this is slow relative to normal peripheral vision. A prior study found that prism adaptation for visual direction did not occur with general wear. We developed a perceptual-motor training regimen that resulted in accurate pointing at p-prism targets after six 1-hour sessions. PURPOSE: This study aimed to determine if improvements in pointing accuracy from perceptual-motor training generalized to collision judgments during simulated walking. METHODS: Participants with hemianopia (n = 13) made collision judgments in virtual reality for a person appearing 0.4 to 13.5° from the walking path. Judgments were measured under fixed gaze, requiring collision judgments via the p-prism image only, and free gaze, representing a more natural scenario. Measurements were made without and with p-prisms immediately after fitting, after a 2-week acclimation, after training, and 3 months later. Controls (n = 13) did one visit without p-prisms. RESULTS: Controls had 100% detection and symmetrically distributed collision judgments for the central 33 and 36% of hazards under fixed gaze and free gaze, respectively. In hemianopia, the seeing side was not different from controls. Blind-side detection was reduced without p-prisms to 40% fixed gaze and 82% free gaze and improved with p-prisms to 99% fixed gaze and 97% free gaze (P < .001). When first worn, fixed-gaze prism side collisions were 63 versus 37% on the seeing side and 41 versus 39% for free gaze (P < .001). There was a small improvement for fixed gaze after the 2-week acclimation (53%, P < .001), but no improvements from training or an additional 3 months of use. CONCLUSIONS: P-prisms improved detection, but collision judgments were inaccurate when seen only via the p-prisms and did not improve with perceptual-motor training. Patients should continue to be advised to turn their head and eyes to fixate the hazard after detection. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Photographic Depiction of the Field of View with Spectacles-mounted Low Vision Aids / Jae-Hyun Jung in OVS : Optometry & Vision Science, vol. 98, 10 (Octobre 2021)
[article]
in OVS : Optometry & Vision Science > vol. 98, 10 (Octobre 2021)
Titre : Photographic Depiction of the Field of View with Spectacles-mounted Low Vision Aids Type de document : article de périodique Auteurs : Jae-Hyun Jung ; Nish Mohith Kurukuti ; Eli Peli Année de publication : 2021 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Optique:basse vision
[Thésaurus HELB]Photographie
[Thésaurus Mesh]Enseignement
[Thésaurus Mesh]Ophtalmologie
[Thésaurus Mesh]OptométrieMots-clés : champs de vision Résumé : SIGNIFICANCE
Photographic depiction helps to illustrate the primary and secondary field of view effects of low vision devices along with their utility to clinicians, patients, and caretakers. This technique may also be helpful for designers and researchers in improving the design and fitting of low vision devices.
PURPOSE
The field of view through spectacles-mounted low vision devices has typically been evaluated using perimetry. However, the perimetric field diagram is different from the retinal image and often fails to represent the important aspects of the field of view and visual parameters. We developed a photographic depiction method to record and veridically show the field of view effects of these devices.
METHODS
We used a 3D-printed holder to place spectacles-mounted devices at the same distance from the empirically determined reference point of the field of view in a camera lens (f = 16 mm) as they would be from an eye, when in use. The field of view effects of a bioptic telescope, a minifier (reverse telescope), and peripheral prisms were captured using a conventional camera, representing retinal images. The human eye pupil size (adjusting the F number: f/2.8 to f/8 and f/22 in the camera lens) and fitting parameters (pantoscopic tilt and back vertex distance) varied.
RESULTS
Real-world indoor and outdoor walking and driving scenarios were depicted as retinal images illustrating the field of view through low vision devices, distinguishing optical and obscuration scotomas, and demonstrating secondary effects (spatial distortions, viewpoint changes, diplopia, spurious reflection, and multiplexing effects) not illustrated by perimetric field diagrams.
CONCLUSIONS
Photographic depiction illustrates the primary and secondary field of view effects of the low vision devices. These images highlight the benefit and possible trade-offs of the low vision devices and may be beneficial in education and training.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire The Invisibility of Scotomas I: The Carving Hypothesis / Eli Peli in OVS : Optometry & Vision Science, vol. 100, 08 (Aout 2023)
[article]
in OVS : Optometry & Vision Science > vol. 100, 08 (Aout 2023)
Titre : The Invisibility of Scotomas I: The Carving Hypothesis Type de document : article de périodique Auteurs : Eli Peli ; Robert Goldstein ; Jae-Hyun Jung Année de publication : 2023 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Paramédical:Réhabilitation
[Thésaurus Mesh]Cellules photoréceptrices en bâtonnet de la rétine
[Thésaurus Mesh]Champs visuels
[Thésaurus Mesh]ScotomeRésumé : SIGNIFICANCE
Veridical depictions of scene appearance with scotomas allow better understanding of the impact of field loss and may improve the development and implementation of rehabilitation. Explanation and depiction of the invisibility of scotoma may lead to patients' understanding and thus better compliance with related treatments.
PURPOSE
Simulations of perception with scotomas guide training, patient education, and rehabilitation research. Most simulations incorrectly depict scotomas as black patches, although the scotomas and the missing contents are usually invisible to patients. We present a novel approach to capture the reported appearance of scenes with scotomas.
METHODS
We applied a content-aware image resizing algorithm to carve out the content elided under the scotomas. With video sequences, we show how and why eye movements fail to increase the visibility of the carved scotomas.
RESULTS
Numerous effects, reported by patients, emerge naturally from the scotoma carving. Carving-eliminated scotomas over natural images are barely visible, despite causing substantial distortions. Low resolution and contrast sensitivity at farther eccentricities and saccadic blur reduce the visibility of the distortions. In a walking scenario, static objects moving smoothly to the periphery disappear into and then reemerge out of peripheral scotomas, invisibly.
CONCLUSIONS
Scotoma carving provides a viable hypothetical simulation of vision with scotomas due to loss of neurons at the retinal ganglion cell level and higher. As a hypothesis, it generates predictions that lend themselves to future clinical testing. The different effects of scotomas due to loss of photoreceptors are left for follow-up work.Note de contenu : Peli, Eli MS, OD, FAAO1∗; Goldstein, Robert PhD1; Jung, Jae-Hyun PhD, FAAO1 Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire