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OVS : Optometry & Vision Science . vol. 96, 06Mention de date : Juin 2019Paru le : 01/06/2019 |
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Ajouter le résultat dans votre panierImpact of Dry Eye on Visual Acuity and Contrast Sensitivity Dry Eye Assessment and Management Study / Loretta B. Szczotka-Flynn in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019) . - p. 387-396
Titre : Impact of Dry Eye on Visual Acuity and Contrast Sensitivity Dry Eye Assessment and Management Study Type de document : article de périodique Auteurs : Loretta B. Szczotka-Flynn, Auteur ; Maureen G. Maguire, Auteur ; Gui-shuang Ying, Auteur Année de publication : 2019 Article en page(s) : p. 387-396 Langues : Français (fre) Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Self-adjustable Spectacle Wearing Compliance and Associated Factors among Rural School Children in Ghana / Alex Azuka Ilechie in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019) . - p. 397-406
Titre : Self-adjustable Spectacle Wearing Compliance and Associated Factors among Rural School Children in Ghana Type de document : article de périodique Auteurs : Alex Azuka Ilechie, Auteur ; Samuel Abokyi, Auteur ; Samuel Boadi-Kusi, Auteur Année de publication : 2019 Article en page(s) : p. 397-406 Langues : Anglais (eng) Langues originales : Anglais (eng) Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Clinical Accuracy of the Nidek ARK-1 Autorefractor / Nabin Paudel in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019) . - p. 407-413
Titre : Clinical Accuracy of the Nidek ARK-1 Autorefractor Type de document : article de périodique Auteurs : Nabin Paudel, Auteur ; Sameep Adhikari, Auteur ; Ajit Thakur, Auteur Année de publication : 2019 Article en page(s) : p. 407-413 Langues : Français (fre) Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire The Effect of Vertically Yoked Prisms on Binocular Vision and Accommodation / Katrina L. Schmid in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019) . - p. 414-423
Titre : The Effect of Vertically Yoked Prisms on Binocular Vision and Accommodation Type de document : article de périodique Auteurs : Katrina L. Schmid, Auteur ; Stephanie D. Beavis, Auteur ; Sophia I. Wallace, Auteur Année de publication : 2019 Article en page(s) : p. 414-423 Langues : Anglais (eng) Langues originales : Anglais (eng) Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Stimulus unpredictability in time, magnitude, and direction on accommodation / Carles Otero in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019)
Titre : Stimulus unpredictability in time, magnitude, and direction on accommodation Type de document : article de périodique Auteurs : Carles Otero ; Mikel Aldaba ; Fernando DÃaz-Doutón ; Fuensanta Vera-Diaz ; Jaume Pujol Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Généralisation du stimulus
[Thésaurus Mesh]StatistiquesRésumé : SIGNIFICANCE The effect of predictability in changes of time, magnitude, and direction of the accommodation demand on the accommodation response latency and its magnitude are insignificant, which suggests that repetitive accommodative tasks such as the clinical accommodative facility test may not be influenced by potential anticipation effects.
PURPOSE The purpose of this study was to investigate the effect of stimulus' time, magnitude, and direction predictability, as well as their interactions, on accommodation latency and response magnitude.
METHODS Monocular accommodative response and latency were measured in 12 young subjects for nine different conditions where the stimulus accommodative demand changed several times in a steplike fashion for a period of 120 seconds. Each change in accommodative demand could have different time duration (i.e., 1, 2, or 3 seconds), magnitude (1, 2, or 3 diopters), and/or direction (i.e., accommodation or disaccommodation). All conditions were created permuting the factors of time, magnitude, and direction with two levels each: random and not random. The baseline condition was a step signal from 0 to 2 diopters persisting for 2 seconds in both accommodative demands. After each condition, subjects were asked to provide a score from 1 to 5 in their perceived predictability.
RESULTS Friedman test conducted on the perceived predictability of each condition resulted in statistically significant differences between the nine conditions (χ2 = 56.57, P < .01). However, repeated-measures analysis of variance applied to latency and accommodative response magnitude did not show significant differences (P > .05). In addition, no correlation was found between the perceived predictability scores and both latency and accommodative response magnitudes between the most predictable and the most unpredictable conditions.
CONCLUSIONS Subjects were able to perceptually notice whether the stimulus was predictable or not, although our results indicate no significant effect of stimuli predictability on either the accommodation latency or its magnitude.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Suprathreshold motion perception in anisometropic amblyopia Interocular speed matching and the pulfrich effect / Goro Maehara in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019)
Titre : Suprathreshold motion perception in anisometropic amblyopia Interocular speed matching and the pulfrich effect Type de document : article de périodique Auteurs : Goro Maehara ; Syunsuke Araki ; Tsuyoshi Yoneda ; Benjamin Thompson ; Atsushi Miki Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Amblyopie
[Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Mouvement
[Thésaurus Mesh]Perception
[Thésaurus HELB]:Optique:luminance
[Thésaurus HELB]:Optique:luminositéRésumé : SIGNIFICANCE Our results indicate that the difference in perceived luminance between the amblyopic and fellow eyes that is present under dichoptic viewing conditions does not affect the perceived speed of suprathreshold motion stimuli. This finding provides a new insight into suprathreshold perception in amblyopia.
PURPOSE Interocular matching experiments indicate that dichoptically presented stimuli have a lower perceived luminance in amblyopic eyes relative to fellow eyes. This may be a consequence of interocular suppression. We investigated whether this effect extends to suprathreshold motion perception.
METHODS Participants with amblyopia and control observers matched the perceived speed of dichoptically presented random-dot kinematograms and the perceived luminance of gray patches. Control participants also performed the speed matching task with a neutral density filter over one eye to simulate a perceived luminance reduction.
RESULTS The amblyopia group exhibited lower perceived luminance in the amblyopic than in the fellow eye, as has previously been reported. However, interocular speed matching was veridical. For control observers, perceived speed was reduced in the eye with a neutral density filter relative to the nonfiltered eye. To assess whether the perceived luminance reduction in the amblyopic eye affected binocular function, we also measured the Pulfrich effect in the amblyopia group with equal luminance presented to each eye. No patients reported a spontaneous Pulfrich effect.
CONCLUSIONS The results suggest that suprathreshold speed perception is intact in the amblyopic eye when both eyes are open.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire A randomized crossover study to assess the usability of two new vision tests in patients with low vision / Jasleen Jolly in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019)
Titre : A randomized crossover study to assess the usability of two new vision tests in patients with low vision Type de document : article de périodique Auteurs : Jasleen Jolly ; Joanna Gray ; Anna Paola Salvetti ; Ruofan Han ; Robert MacLaren Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Acuité visuelle
[Thésaurus Mesh]Études croisées
[Thésaurus Mesh]Études par échantillonnage
[Thésaurus Mesh]Tests de vision
[Thésaurus Mesh]Vision faibleMots-clés : test de Freiburg test de Berkeley Résumé : SIGNIFICANCE Well-established charts such as Early Treatment Diabetic Retinopathy Study are able to quantify visual acuity (VA) with a low cutoff of 1.6 logMAR. Below this point, nonquantitative measures, such as count fingers, hand movements, and light perception, are used. There is a need for more reproducible, comparable, and reliable ways to measure VA changes in this patient cohort.
PURPOSE The purpose of this study was to examine and compare the ability of the Berkeley Rudimentary Vision Test (BRVT) and the Freiburg Acuity Test (FrACT) to quantify VA in low-vision patients who score nonnumerical VAs in standard charts.
METHODS Fifty adult participants with VA ≤1.0 logMAR in both eyes were recruited from the Oxford Eye Hospital, Oxford, United Kingdom. Correlation between FrACT and BRVT results and the correlation between VA and daily living activities were analyzed statistically. Potential predictors of differences were investigated.
RESULTS The BRVT was significantly faster to conduct (P = .002), but FrACT was able to quantify vision numerically in a greater proportion of eyes. The κ agreement between tests was 0.26. The difference increased systematically with the VA reduction (P < .0001). The Bland-Altman analysis showed a skew to measurement of lower logMAR VA indicating better vision measured on the FrACT. The only significant predictor of difference between the tests was binocular VA (coefficient, −0.445; P = .001).
CONCLUSIONS Both tests are suitable for a very low-vision population. The BRVT is a faster test to administer, but FrACT provides a numerical result in more eyes. The poor intertest repeatability indicates that they cannot be used interchangeably. The BRVT generally reported poorer vision than did the FrACT. The medium of presentation, such as a computer screen or externally lit print medium, is likely to be the biggest factor in these differences and warrants further investigation.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Case report : vitamin a deficiency and nyctalopia in a patient with chronic pancreatitis / Anne Lee in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019)
Titre : Case report : vitamin a deficiency and nyctalopia in a patient with chronic pancreatitis Type de document : article de périodique Auteurs : Anne Lee ; Nina Tran ; Jennifer Monarrez ; David Mietzner Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Carence en vitamine A
[Thésaurus Mesh]Présentations de cas
[Thésaurus Mesh]Rétine
[Thésaurus Mesh]Troubles de la vision
[Thésaurus HELB]:Paramédical:PancréatiteMots-clés : fonction rétinienne nyctalopie Résumé : SIGNIFICANCE Vitamin A deficiency is a known concern in developing countries, but it is often overlooked in developed regions. A history of conditions causing alimentary malabsorption should be considered when patients present with complaints of nyctalopia.
PURPOSE A case of vitamin A deficiency with nyctalopia in a patient with chronic pancreatitis including pertinent diagnostic testing, treatment, and management is presented. The intent is to draw attention to the condition as a differential diagnosis for nyctalopia due to increased prevalence of conditions causing malabsorption.
CASE REPORT A patient with a history of chronic pancreatitis and pancreatic tumor presented with symptoms of nyctalopia and xerophthalmia. Given his systemic history, testing was ordered to determine serum vitamin A levels and retinal function. After results had confirmed depleted vitamin A levels and diminished retinal function, treatment with both oral and intramuscular vitamin A supplementation was initiated to normalize vitamin A levels and improve retinal photoreceptor function. Subjective improvement in symptoms was reported shortly after beginning supplementation, and ultimately, vitamin A levels and retinal function showed improvement after intramuscular treatment.
CONCLUSIONS Detailed case history and a careful review of systems along with serum vitamin A testing and, if available, electroretinography to assess retinal function can help to make a definitive diagnosis. With appropriate comanagement with the patient's primary care physician, it is possible for those with nyctalopia to begin vitamin A supplementation and regain retinal function.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Case report: adaptation of a telescope with a minus lens cap for highly myopic patient / Tracy L. Matchinski in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019)
Titre : Case report: adaptation of a telescope with a minus lens cap for highly myopic patient Type de document : article de périodique Auteurs : Tracy L. Matchinski ; John J Rimkus ; Kelli Theisen Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:T:Troubles de la réfraction oculaire:Troubles de la réfraction oculaire / thérapie
[Thésaurus Mesh]Myopie
[Thésaurus Mesh]Présentations de cas
[Thésaurus Mesh]Troubles de la réfraction oculaire
[Thésaurus HELB]:Optique:telescopeRésumé : SIGNIFICANCE This case report demonstrates a novel approach of using the optical principle of vergence amplification to correct for a visually impaired patient's ametropia while using a telescope system. This approach is easy to apply clinically.
PURPOSE The purpose of this study was to present a novel approach of correcting high myopia for a patient with visual impairment using a spectacle-mounted telescope.
CASE REPORT A 51-year-old man desired improved distance vision for television viewing and facial recognition. His refractive error was −18.00 diopter sphere in each eye with best-corrected acuities of 5/225 (20/900 Snellen equivalent) for the right eye and 10/225 (20/450) for the left eye. Over the years, multiple attempts at contact lens use were unsuccessful, and the patient used spectacle prescription. After evaluating telescope systems, the patient was successful with a 7 × 30 Beecher Mirage Keplerian telescope system. This system cannot be worn over glasses. To correct his ametropia, a −0.25-diopter minus lens cap was applied in front of the objective lens of the telescope, capitalizing on the property of vergence amplification. In addition, the tube length was adjusted. Adding lenses in front of the telescope and focusing the telescope can both affect the angular magnification of the system. Depending on the lenses used, type of telescope, and refractive error, there can be an increase or decrease in angular magnification. In this case, the minus lens at the front of the telescope decreased the power of the objective lens, and the focusing for the remaining uncorrected myopia increased the power of the ocular lens. Both of these factors contributed to increased resultant angular magnification for this patient. The patient achieved 10/30 (20/60) vision and reported success with his distance vision.
CONCLUSIONS Minus-powered lens caps over the objective lens are a viable option for highly myopic individuals who wish to use premanufactured spectacle-mounted telescopes.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Myopia control Why each diopter matters / Mark A. Bullimore in OVS : Optometry & Vision Science, vol. 96, 06 (Juin 2019)
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in OVS : Optometry & Vision Science > vol. 96, 06 (Juin 2019)
Titre : Myopia control Why each diopter matters Type de document : article de périodique Auteurs : Mark A. Bullimore ; Noel Brennan Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:M:Myopie:Myopie / diagnostic
[Thésaurus Mesh]ThérapeutiqueMots-clés : ralentissement de la progression Résumé : SIGNIFICANCE Reducing the incidence or prevalence of any disease by 40% is of huge public health significance. Slowing myopia by 1 diopter may do just that for myopic maculopathy—the most common and serious sight-threatening complication of myopia. There is a growing interest in slowing the progression of myopia due to its increasing prevalence around the world, the sight-threatening consequences of higher levels of myopia, and the growing evidence-based literature supporting a variety of therapies for its control. We apply data from five large population-based studies of the prevalence of myopic maculopathy on 21,000 patients. We show that a 1-diopter increase in myopia is associated with a 67% increase in the prevalence of myopic maculopathy. Restated, slowing myopia by 1 diopter should reduce the likelihood of a patient developing myopic maculopathy by 40%. Furthermore, this treatment benefit accrues regardless of the level of myopia. Thus, while the overall risk of myopic maculopathy is higher in a –6-diopter myope than in a –3-diopter myope, slowing their myopic progression by 1 diopter during childhood should lower the risk by 40% in both. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
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