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Auteur Jae-Hyun Jung
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherchePhotographic 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