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Vision monoculaire
Images seen by one eye.
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Case Report: When Two Is Worse Than One—Stereo Imbalance in a Case of Wavefront-guided Scleral Lenses / Lan Chi Nguyen in OVS : Optometry & Vision Science, vol. 100, 05 (Mai 2023)
[article]
in OVS : Optometry & Vision Science > vol. 100, 05 (Mai 2023)
Titre : Case Report: When Two Is Worse Than One—Stereo Imbalance in a Case of Wavefront-guided Scleral Lenses Type de document : article de périodique Auteurs : Lan Chi Nguyen ; Wei Hau Lew ; Matthew J. Kauffman ; Jason Marsack ; Raymond A Applegate ; Daniel R. Coates Année de publication : 2023 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Acuité visuelle
[Thésaurus Mesh]Vision binoculaire
[Thésaurus Mesh]Vision monoculaire
[Thésaurus HELB]:Optique:lentilles scléralesMots-clés : contraste rétinien équilibre binoculaire stéréoacuité lentilles sclérales guidées par le front d'onde Résumé : SIGNIFICANCE: Wavefront-guided scleral lenses (WGSLs) reduce visually debilitating residual higher-order aberrations. Although reduced higher-order aberrations lead to improvement in monocular high-contrast visual acuity (VA), the success of the lenses in everyday life depends on additional factors such as retinal contrast, binocular balance, and stereoacuity. PURPOSE: This report describes a case where WGSLs provided improved monocular vision compared with scleral lenses (SLs) but reduced binocularity and stereoacuity. CASE REPORT: A 48-year-old woman with moderate keratoconus right eye (OD) and severe left eye (OS) was fitted with SLs and WGSLs. Visual acuity with best SLs was 20/20−2 OD and 20/25−2 OS. Residual higher-order rootmean-square (HORMS) wavefront error (6 mm pupil) was 0.56 μm OD and 1.38 μm OS. Visual acuity with WGSLs was 20/16−2 OD and 20/25+2 OS, and residual HORMS was 0.41 μm OD and 0.98 μm OS. Monocularly, WGSLs were reported to provide better VA. However, binocularly, the patient reported an “imbalanced feeling” and preferred the SLs over WGSLs. Binocular VA at distance was 20/25 with SLs and 20/25−2 with WGSL. To investigate, the Worth Four-Dot test was performed, and the outcomes reported fusion with SLs but suppression OS at distance with WGSLs. Stereoacuity was 160 arc seconds at near and 120 arc seconds at distance with SLs and 400 arc seconds at near and >1200 arc seconds at distance with WGSLs. Dichoptic contrast balancing showed a balance point of 0.48 with SLs and 0.17 with WGSLs, indicating a strong preference toward OD. Simulation of the patient's retinal image revealed a greater difference in image contrast between the two eyes with WGSLs. CONCLUSIONS: Wavefront-guided scleral lenses reduced HORMS and improved VA compared with SLs. However, in this case, it inadvertently caused binocular imbalance. As WGSLs become more widely available, future work should include methods to optimize binocular balance to maximize overall patient satisfaction. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Entraînement à la vision monoculaire / Mildred Smith Evans
Titre : Entraînement à la vision monoculaire Type de document : Monographie Auteurs : Mildred Smith Evans, Auteur Editeur : Charleroi : Héraly Année de publication : 1950 Autre Editeur : Bruxelles : Héraly Pages : VII, 93 p. : ill. : 28 cm Descripteurs (mots clés) : [Thésaurus Mesh]Orthoptie
[Thésaurus Mesh]Vision monoculairePermalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= Exemplaires
Cote Support Localisation Section Disponibilité C151/SMI/EN Livre Erasme - secteur C clinique C151 - Organes des sens (sauf vision) Disponible Monocular Perception of Equidistance: The Effects of Viewing Experience and Motion-generated Information / Shenying Chen in OVS : Optometry & Vision Science, vol.99, 05 (Mai 2022)
[article]
in OVS : Optometry & Vision Science > vol.99, 05 (Mai 2022)
Titre : Monocular Perception of Equidistance: The Effects of Viewing Experience and Motion-generated Information Type de document : article de périodique Auteurs : Shenying Chen ; Yusi Li ; Jing Samantha Pan Année de publication : 2022 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:V:Vision monoculaire:Vision monoculaire / physiologie
[Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Tests de vision
[Thésaurus Mesh]Vision monoculaireMots-clés : équidistance profondeur statique Résumé : SIGNIFICANCE: Using static depth information, normal observers monocularly perceived equidistance with high accuracy. With dynamic depth information and/or monocular viewing experience, they perceived with high precision.
Therefore, monocular patients, who were adapted to monocular viewing, should be able to perceive equidistance and perform related tasks.
PURPOSE: This study investigated whether normal observers could accurately and precisely perceive equidistance with one eye, in different viewing environments, with various optical information and monocular viewing experience.
METHODS: Sixteen normally sighted observers monocularly perceived the distance (5 to 30 m) between a target and the self and replicated it either in some hallways that contained ample static monocular depth information but had a limited field of view or on a lawn that contained less depth information but had a large field of view. Participants remained stationary or walked 5 m before performing the task, as a manipulation of the availability of dynamic depth information. Eight observers wore eye patches for 3 hours before the experiment and gained monocular viewing experience, whereas the others did not. Both accuracy and precision were measured.
RESULTS: As long as static monocular depth information was available, equidistance perception was effectively accurate, despite minute underestimation. Perception precision was improved by prior monocular walking and/or experience with monocularity. Accuracy and precision were not affected by the viewing environments.
CONCLUSIONS: Using static and dynamic monocular depth information and/or with monocular experience, normal observers judged equidistance with reliable accuracy and precision. This implied that patients with monocular
vision, who are better adapted than participants of this study, should a so be able to perceive equidistance and perform distance-dependent tasks in natural viewing environments.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire
[article]
in OPTOMETRY TODAY > vol. 59, 6 (Juin 2019) . - p. 67-71
Titre : New developments for amblyopia Type de document : article de périodique Auteurs : Akash Siungh Chima Année de publication : 2019 Article en page(s) : p. 67-71 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Amblyopie
[Thésaurus Mesh]Revue de la littérature
[Thésaurus Mesh]Vision binoculaire
[Thésaurus Mesh]Vision monoculaireMots-clés : review vision, monocular vision, binocular amblyopia Résumé : This article reviews the literature to outline amblyopia treatments that aim to improve binocular as well as monocular visual outcomes Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité O Périodique Erasme - périodiques Périodiques Disponible Spatial Interactions in Interocular and Monocular “Blur Suppression” / Jin Qian in OVS : Optometry & Vision Science, vol. 99, 12 (Décembre 2022)
[article]
in OVS : Optometry & Vision Science > vol. 99, 12 (Décembre 2022)
Titre : Spatial Interactions in Interocular and Monocular “Blur Suppression” Type de document : article de périodique Auteurs : Jin Qian ; Saumil S. Patel ; Harold E. Bedell Année de publication : 2022 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:O:Oeil:Oeil / métabolisme
[Thésaurus Mesh]Vision binoculaire
[Thésaurus Mesh]Vision monoculaire
[Thésaurus Mesh]Vision oculaireMots-clés : image floue Interactions spatiales Résumé : SIGNIFICANCE: The suppression of blurred images in one eye by clear images in the other eye is thought to contribute to the success of monovision correction. We show that interocular suppression occurs also for low-contrast targets that are not blurred and, to a lesser extent, when clear and low-contrast targets are presented to the same eye. PURPOSE: A blurred target presented to one eye may be suppressed when a clear target is presented to the other eye. We sought to determine how this interocular suppression varies according to the separation between the blurred and clear targets and the magnitude of imposed blur. In addition, we examined whether a similar suppression occurs when the clear and blurred targets are imaged in the same eye. METHODS: Subjects (N = 4) viewed a clear 20/40 Sloan letter surrounded by four 2 10 min-arc flanking bars. In different blocks of trials, the gap between the letter and flanking bars varied from 0.5 to 4 bar widths. In addition, the flanking bars were either clear or spatially filtered to simulate 0.5 to 2 D of blur. The contrast required to detect the flanking bars was determined when the letter and flanking bars were presented either dichoptically or monoptically and compared with the thresholds for the bar targets presented alone. RESULTS: In both dichoptic and monoptic viewing conditions, detection thresholds for the blurred flanking bars are highest for the smallest spatial gap and decrease systematically as the gap increases. Thresholds are uniformly higher during dichoptic than monocular viewing, but the proportional change with the bar-to-letter separation is similar in both conditions. Surprisingly, the magnitude of imposed blur has very little influence on the magnitude of threshold elevation in either the dichoptic or monoptic viewing conditions. CONCLUSIONS: Because threshold elevation is nearly the same in the presence of 0 to 2 D of blur, we prefer to designate the phenomenon we studied as “contrast suppression.” The similar spatial characteristics of suppression during dichoptic and monoptic viewing are consistent with contributions from a common neural mechanism. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Analyse de la vision. Tome 1 : vision monoculaire / Pierre-Yves Cazeau
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