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Auteur Raimundo Jiménez
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Ajouter le résultat dans votre panier Affiner la rechercheDiurnal Variation in Accommodation, Binocular Vergence, and Pupil Size / Beatriz Redondo in OVS : Optometry & Vision Science, vol. 100, 12 (Décembre 2023)
[article]
in OVS : Optometry & Vision Science > vol. 100, 12 (Décembre 2023)
Titre : Diurnal Variation in Accommodation, Binocular Vergence, and Pupil Size Type de document : article de périodique Auteurs : Beatriz Redondo ; Maria Serramito-Blanco ; Jesús Vera ; Marina Alguacil-Espejo ; Mercedes Rubio-MartÃnez ; Rubén Molina ; Raimundo Jiménez Année de publication : 2023 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Convergence oculaire
[Thésaurus Mesh]Optométrie
[Thésaurus Mesh]OrthoptieMots-clés : fonction pupillaire amplitude accommodative vergence binoculaire Résumé : SIGNIFICANCE
Our results show significant diurnal variations in accommodative function and the magnitude of the phoria. Therefore, when comparing visual measures in clinical or laboratory settings, performing the visual examination at the same time of day (±1 hour) is encouraged.
PURPOSE
The aim of this study was to evaluate the accommodation, binocular vergence, and pupil behavior on three different times during the day.
METHODS
Twenty collegiate students (22.8 ± 2.1 years) participated in this study. Participants visited the laboratory on three different days at 2-hourly intervals (morning, 9:00 to 11:00 am; afternoon, 2:00 to 4:00 pm; evening, 7:00 to 9:00 pm). The binocular vergence and accommodative function were measured using clinical optometric procedures, and the accommodative response and pupil function were evaluated in binocular conditions using the WAM-5500 autorefractometer.
RESULTS
The accommodative amplitude for the right and left eyes showed statistically significant differences for the time interval (P = .001 and P = .02, respectively), revealing higher accommodative amplitude in the morning and afternoon in comparison with the evening. Participants were more esophoric when assessed in the morning in comparison with the evening at far and near (P = .02 and P = .01, respectively) and when assessed in the afternoon in comparison with the evening at far distance (P = .02). The magnitude of accommodative response was higher in the morning, and it decreased throughout the day at 500 (P < .001), 40 (P = .05), and 20 cm (P < .001). No statistically significant differences were obtained for any other variable.
CONCLUSIONS
This study shows small diurnal variations in some accommodative and binocular vergence parameters, but no effects were observed for the pupil response. These outcomes are of special relevance for eye care specialists when performing repeated accommodative or binocular vergence measures. However, the diurnal variations were modest and may not influence a routine orthoptic examination.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 Blood Flow Restriction at Different Intensities on IOP and Ocular Perfusion Pressure / Jesús Vera in OVS : Optometry & Vision Science, vol. 97,04 (Avril 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97,04 (Avril 2020)
Titre : Effects of Blood Flow Restriction at Different Intensities on IOP and Ocular Perfusion Pressure Type de document : article de périodique Auteurs : Jesús Vera ; Raimundo Jiménez ; Beatriz Redondo ; Marcos Alvarez Garcia Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Étude comparative
[Thésaurus Mesh]Oeil
[Thésaurus Mesh]Tonométrie oculaire
[Thésaurus Mesh]Vitesse du flux sanguin
[Thésaurus HELB]:Optique:pression intraoculaireRésumé : SIGNIFICANCE: The use of blood flow restriction allows obtaining beneficial physical adaptions when combined with low-intensity exercise or even when used alone. We found that using blood flow restriction may be a potential strategy to avoid IOP and ocular perfusion pressure fluctuations provoked by strength and endurance training. PURPOSE: The purpose of this study was to assess the influence of bilateral blood flow restriction in the upper and lower body at two different intensities on IOP and ocular perfusion pressure, as well as the possible sex differences. METHODS: Twenty-eight physically active university students (14 men and 14 women) took part in the study, and blood flow restriction was bilaterally applied with two pressures in the legs and arms. There were five experimental conditions (control, legs-high, legs-low, arms-high, and arms-low). IOP was measured by rebound tonometry before, during (every 4 seconds), and immediately after blood flow restriction. Ocular perfusion pressure was measured before and after blood flow restriction. RESULTS: We found that only the arms-high condition promoted a statistically significant IOP rise when compared with the rest of the experimental conditions (all Bayes factors10, >100; effect sizes, 1.18, 1.06, 1.35, and 1.73 for the control, arms-low, legs-high, and legs-low conditions, respectively). For ocular perfusion pressure, there was strong evidence for the null hypothesis regarding the type of blood flow restriction (Bayes factor10, 0.012); however, men showed an ocular perfusion pressure reduction after blood flow restriction in the arms-high condition (Bayes factor10, 203.24; effect size, 1.41). CONCLUSIONS: This study presents preliminary evidence regarding the safety of blood flow restriction in terms of ocular health. Blood flow restriction may be considered as an alternative training strategy to reduce abrupt fluctuations in IOP and ocular perfusion pressure because its use permits a considerable reduction of exercise intensity. En ligne : https://journals.lww.com/optvissci/Fulltext/2020/04000/Effects_of_Blood_Flow_Res [...] 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 optical correction method on the magnitude and variability of accommodative response / Raimundo Jiménez in OVS : Optometry & Vision Science, vol. 96, 08 (Aout 2019)
[article]
in OVS : Optometry & Vision Science > vol. 96, 08 (Aout 2019)
Titre : Effects of optical correction method on the magnitude and variability of accommodative response Type de document : article de périodique Auteurs : Raimundo Jiménez ; Beatriz Redondo ; Leon Davies ; Jesús Vera Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:M:Myopie:Myopie / thérapie
[Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Lentilles de contact
[Thésaurus Mesh]Lunettes correctricesRésumé : SIGNIFICANCE The present study addresses the accommodative response and its dependence on the type of optical correction used. The results are discussed relative to their possible implications for myopia progression and visual fatigue.
PURPOSE The accommodative response has been investigated owing to its possible relationship with the onset and progression of myopia and visual fatigue. This study explored the influence of wearing soft contact lenses in comparison with spectacles in terms of magnitude and variability of accommodation. In addition, we analyzed the intersession and intermethod repeatability.
METHODS Dynamic accommodative response was recorded during 30-second epochs, at five different distances (50, 40, 33, 25, and 20 cm), in 21 individuals (mean refractive error ± SD, −0.79 ± 1.39 D) while wearing either soft contact lenses or spectacles on two different days. To assess repeatability, a second identical intervention was conducted.
RESULTS Higher lags of accommodation were obtained with the use of soft contact lenses in comparison with the spectacle condition (P = .04, partial η2 [ηp2] = 0.204), and similarly, a higher variability of accommodation at near distances was found during the soft contact lens measurement (P < .001, ηp2 = 0.647). There was a strong intersession repeatability at all the distances tested for both optical correction methods.
CONCLUSIONS The higher accommodative lag and fluctuations found while wearing soft contact lenses in comparison with spectacles may help to understand the mechanisms underlying myopia progression and asthenopia. These findings may be also considered when testing the accommodative response in research settings. Our test-retest design confirmed that there is a very good intersession repeatability for all the distances in both optical correction methods.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Intraocular pressure as an indicator of the level of induced anxiety in basketball / Jesús Vera in OVS : Optometry & Vision Science, vol. 96, 03 (Mars 2019)
[article]
in OVS : Optometry & Vision Science > vol. 96, 03 (Mars 2019) . - p. 164-171
Titre : Intraocular pressure as an indicator of the level of induced anxiety in basketball Type de document : article de périodique Auteurs : Jesús Vera, Auteur ; Raimundo Jiménez, Auteur ; Beatriz Redondo, Auteur Année de publication : 2019 Article en page(s) : p. 164-171 Langues : Anglais (eng) Langues originales : Anglais (eng) Descripteurs (mots clés) : [Thésaurus Mesh]Basketball
[Thésaurus Mesh]Performance sportive
[Thésaurus Mesh]Sports
[Thésaurus Mesh]Stress psychologique
[Thésaurus HELB]:Paramédical:Pression intraoculaireRésumé : SIGNIFICANCE Our data demonstrate that intraocular pressure (IOP) is sensitive to anxiety manipulation in sport scenarios, specifically in a basketball free throw task. The present outcomes may be of special relevance because of its practical advantages for the objective control of athletes' anxiety levels.
PURPOSE Athletes experience high levels of anxiety during sport competition, and IOP has demonstrated to reflect autonomous nervous system changes during mentally demanding situations. We tested whether different levels of induced anxiety during basketball free throw shooting alter IOP.
METHODS We followed a repeated-measures design to test the effects of anxiety-induced manipulation during basketball free throw shooting on IOP, shooting performance, and perceived anxiety. Eighteen amateur basketball players performed three experimental sessions consisting of 100 free throws each. However, we gave three different instructions to participants regarding the score assigned to each free throw, allowing us to manipulate the level of induced anxiety (low, medium, and high).
RESULTS Confirming a successful anxiety manipulation, basketball players reported more perceived anxiety with higher levels of induced anxiety (P < .001, η2 = 0.37). Our data show that higher levels of induced anxiety provoke an acute IOP rise (P < .001, η2 = 0.44), with the low-, medium-, and high-anxiety–induced conditions promoting an average IOP rise of 0.21, 1.63, and 18.46%, respectively. Also, there was a linear IOP rise over time in the high-anxiety–induced condition (r = 0.82). Nevertheless, we found no effect of anxiety-induced manipulation on basketball free throw performance (P = .93).
CONCLUSIONS Intraocular pressure is sensitive to anxiety-induced manipulation during basketball free throw shooting, showing an increase in parallel with accumulated anxiety. Based on these findings, IOP may be considered a promising tool for the assessment of the level of anxiety in certain sport situations. Future studies are required to explore the generalizability of these results in other scenarios with different physical and mental demands.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Intraocular Pressure Responses to Four Different Isometric Exercises in Men and Women / Jesús Vera in OVS : Optometry & Vision Science, vol. 97, 08 (Aout 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 08 (Aout 2020)
Titre : Intraocular Pressure Responses to Four Different Isometric Exercises in Men and Women Type de document : article de périodique Auteurs : Jesús Vera ; Beatriz Redondo ; George-Alex Koulieris ; Alejandro Torrejon ; Raimundo Jiménez ; Amador Garcia-Ramos Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Exercice physique
[Thésaurus Mesh]Glaucome
[Thésaurus HELB]:Optique:pression intraoculaireRésumé : SIGNIFICANCE: The performance of resistance exercise has evidenced to induce abrupt intraocular pressure (IOP)
changes, which has been linked to the onset and progression of glaucoma. We found that four different isometric
resistance exercises lead to an instantaneous and progressive IOP elevation, with these changes being independent
of the type of exercise.
PURPOSE: The impact of physical exercise on IOP has demonstrated to be dependent on exercise type and
intesity, as well as individuals' characteristics. In this study, we aimed to explore the influence of the load, exercise
type, and participant's sex on the IOP behavior during a 2-minute isometric effort.
METHODS: Twenty-eight physically active collegiate students performed 2 minutes of isometric exercise in the
military press, biceps curl, leg extension, and calf raise exercises against two different loads (high load and low load).
Intraocular pressure was measured by rebound tonometry before, during (semicontinuos assessment [24 measurements]), and after 10 seconds of recovery in each of the eight (four exercises two loads) conditions.
RESULTS: We found a statistically significant effect of load (P< .001, Æžp
2 = 0.906), with greater IOP values when performing the isometric exercises against heavier loads. There was a positive IOP rise during the execution of isometric exercise
in the high-load condition, returning to baseline levels after 10 seconds of passive recovery. The exercise type
and participant's sex did not reveal statistically significant differences (P = .33 and P = .56, respectively).
CONCLUSIONS: Our data evidenced an instanteneous and progressive IOP rise during the execution of isometric
exercise leading to muscular failure, regardless of the exercise type and participant's sex. After exercise, IOP rapidly
retuned to baseline levels (within 10 seconds). The inclusion of glaucoma patients in future studies is guarranteed.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Visual Perceptual Skills in Attention-deficit/Hyperactivity Disorder Children: The Mediating Role of Comorbidities / Beatriz Redondo in OVS : Optometry & Vision Science, vol. 96, 09 (Septembre 2019)
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