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Comparison of Dynamic Retinoscopy and Autorefraction for Measurement of Accommodative Amplitude / Rami Aboumourad in OVS : Optometry & Vision Science, vol. 96, 09 (Septembre 2019)
[article]
in OVS : Optometry & Vision Science > vol. 96, 09 (Septembre 2019)
Titre : Comparison of Dynamic Retinoscopy and Autorefraction for Measurement of Accommodative Amplitude Type de document : article de périodique Auteurs : Rami Aboumourad ; Heather Anderson Année de publication : 2019 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Analyse appariée
[Thésaurus Mesh]Collecte de données
[Thésaurus Mesh]Rétinoscopie
[Thésaurus Mesh]Tests de vision
[Thésaurus HELB]:Optique:amplitude d'accommodationRésumé : SIGNIFICANCE: This study promotes the use of dynamic retinoscopy to obtain objective measures of accommodative amplitude (AA) in the clinical setting in lieu of the subjective push-up technique. PURPOSE: This study compared the agreement between open-field autorefraction and a modified dynamic retinoscopy for the objective measurement of AA. METHODS: Accommodative amplitude was measured using two objective techniques for subjects aged 5 to 60 years. Test order was randomized and monocular AA was measured as subjects viewed printed letters 0.9 mm in height with their dominant eye and distance refraction. For retinoscopy, subjects held a near rod and viewed the target at the nearest (most proximal) point of clear vision. The examiner then performed dynamic retinoscopy along the horizontal meridian and identified the physical location of neutrality of the reflex, which was converted to AA in diopters. Autorefraction was performed obtaining repeated measures of refraction beginning from a target demand of 2.5 D and increasing in discrete steps until there was no subsequent increase in accommodative response. Refractions were converted to power in the horizontal meridian and expressed as accommodation in diopters with the maximal value termed the AA. Distance overrefractions were measured for both techniques to adjust AA for any uncorrected refractive error. Difference versus mean analysis was used to compare agreement between tests. RESULTS: The 95% limits of agreement between techniques were calculated after removal of two young outliers who responded poorly to one of the techniques. The overall mean difference for 95 subjects was 0.02 ± 0.97 D, with limits of agreement spanning −1.87 to 1.92 D. No significant linear relationship between the magnitude of the AA and the differences between techniques was observed. CONCLUSIONS: Agreement between dynamic retinoscopy and open-field autorefraction was less than 2 D with no systematic bias, suggesting that dynamic retinoscopy may be a suitable clinical technique to measure objective AA. Note de contenu :
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Cote Support Localisation Section Disponibilité aucun exemplaire Comparison of proximal and minus lens autorefraction techniques to measure monocular accommodative amplitude / Sidney M. Parks in OVS : Optometry & Vision Science, vol. 101, 02 (Fevrier 2024)
[article]
in OVS : Optometry & Vision Science > vol. 101, 02 (Fevrier 2024)
Titre : Comparison of proximal and minus lens autorefraction techniques to measure monocular accommodative amplitude Type de document : article de périodique Auteurs : Sidney M. Parks ; Heather Anderson Année de publication : 2024 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Collecte de données
[Thésaurus HELB]:Optique:amplitude d'accommodationMots-clés : amplitude accommodative monoculaire autoréfracteur Résumé : SIGNIFICANCE
This study provides a faster method for objectively measuring accommodative amplitude with an open-field autorefractor in a research setting.
PURPOSE
Objective measures of accommodative amplitude with an autorefractor take time because of the numerous stimulus demands tested. This study compares protocols using different amounts and types of demands to shorten the process.
METHODS
One hundred participants were recruited for four age bins (5 to 9, 10 to 14, 15 to 19, and 20 to 24 years) and monocular amplitude measured with an autorefractor using three protocols: proximal, proximal-lens (letter), and proximal-lens (picture). For proximal, measurements were taken as participants viewed a 0.9 mm “E” placed at 13 demands (40 to 3.3 cm = 2.5 to 30 D). The other protocols used a target (either the “E” or a detailed picture) placed at 33 and 12.5 cm followed by 12.5 cm with a series of lenses (−2, −4, and −5.5 D). Adjustments were made for lens effectivity for the three lens conditions, which were thus 9.6, 11.1, and 12.0 D for individuals without additional spectacle lenses. Accommodative amplitude was defined as the greatest response measured with each technique. One-way analysis of variance was used to compare group mean amplitudes across protocols and differences between letter protocols by age bin.
RESULTS
Amplitudes were significantly different between protocols (p < 0.001), with proximal having higher amplitudes (mean ± standard deviation, 8.04 ± 1.70 D) compared with both proximal-lens protocols (letter, 7.48 ± 1.42 D; picture, 7.43 ± 1.42 D) by post hoc Tukey analysis. Differences in amplitude between the proximal and proximal-lens (letter) protocol were different by age group (p = 0 .003), with the youngest group having larger differences (1.14 ± 1.58 D) than the oldest groups (0.17 ± 0.58 and 0.29 ± 0.48 D, respectively) by post hoc Tukey analysis.
CONCLUSIONS
The proximal-lens protocols took less time and identified the maximum accommodative amplitude in participants aged 15 to 24 years; however, they may underestimate true amplitude in younger children.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Objective and subjective assessment of accommodative insufficiency / Alejandro León in OVS : Optometry & Vision Science, vol. 101, 01 (Janvier 2024)
[article]
in OVS : Optometry & Vision Science > vol. 101, 01 (Janvier 2024)
Titre : Objective and subjective assessment of accommodative insufficiency Type de document : article de périodique Auteurs : Alejandro León ; Mark Rosenfield ; Sandra Milena Medrano ; Sandra Carolina Durán ; Carol Violet Pinzón Année de publication : 2024 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Diagnostic
[Thésaurus Mesh]Rétinoscopie
[Thésaurus HELB]:Optique:amplitude d'accommodationMots-clés : insuffisance accommodative calcul rétinoscopie dynamique objective Résumé : SIGNIFICANCE: A variety of subjective and objective procedures are available to measure the amplitude of accommodation. However, it is unclear whether the standard criterion of Hofstetter's minimum minus 2D can be used to diagnose accommodative insufficiency with each of these techniques.
PURPOSE: The use of objective dynamic retinoscopy and three subjective techniques to diagnosis accommodative insufficiency was examined. METHODS: A total of 632 subjects between 8 and 19years of agewere enrolled.
Accommodative lag, monocular accommodative facility, and subjective (push-up,modified push-down, andminus lens) and objective (dynamic retinoscopy) amplitude of accommodation were quantified. Accommodative insufficiency was diagnosed based on Hofstetter's minimum minus 2 D for each subjective method, as well as adding an additional subjective criterion
(either accommodative lag exceeding 0.75D or monocular accommodative facility falling below the age-expected norms).
RESULTS: The prevalence of accommodative insufficiency was lowest and highest with the push-up (7.9 and 1%) and dynamic retinoscopy (94 and 12%) procedures when measured without and with the additional subjective criteria, respectively. Comparing the validity of dynamic retinoscopy against the traditional criterion, moderate to low sensitivity and high specificity were found. However, adding the additional subjective criteria improved the findings with moderate to high sensitivity and high specificity.
Using a cutoff for dynamic retinoscopy of 7.50D showedmoderate diagnostic accuracy based on likelihood ratios.
CONCLUSIONS: It is clear that a revised definition of accommodative insufficiency is required, which must include the method of assessing accommodation.
The various objective and subjective methods for quantifying the amplitude of accommodation are not interchangeable, and subjective assessment does not provide a valid measure of the accommodative response.
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Cote Support Localisation Section Disponibilité aucun exemplaire The Effect of Retinal Illuminance on the Subjective Amplitude of Accommodation / Francisco Lara in OVS : Optometry & Vision Science, vol. 97, 08 (Aout 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 08 (Aout 2020)
Titre : The Effect of Retinal Illuminance on the Subjective Amplitude of Accommodation Type de document : article de périodique Auteurs : Francisco Lara ; Antonio J. Del Águila-Carrasco ; Iván Marín-Franch ; Resurrección Riquelme-Nicolás ; Norberto L López-Gil Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Accommodation oculaire
[Thésaurus Mesh]Pupille
[Thésaurus HELB]:Optique:amplitude d'accommodation
[Thésaurus HELB]:Optique:luminositéMots-clés : presbytie nocturne Résumé : SIGNIFICANCE: We show that the amplitude of accommodation decreases with retinal illumination even under
photopic reading conditions and a constant pupil size. This result provides a basis for clinical approaches that
are not based on an optical explanation.
PURPOSE: We investigated the effect of retinal illuminance on the amplitude of accommodation while the pupil of
the eye remained constant.
METHODS: The amplitudes of accommodation of 10 young subjects (from 20 to 38 years of age) and that of 10
presbyopic subjects (from 45 to 54 years of age) were measured subjectively through an artificial pupil of 5 mm
using a Badal optometer and for four values of retinal illuminance: 222, 821, 2138, and 5074 trolands. Phenylephrine was instilled to all the subjects to ensure that their natural pupil was greater than the artificial one in all experimental runs. Linear mixed-effects model for repeated measures with age and log luminance as covariates were used
to check whether changes in amplitude of accommodation with retinal illumination were statistically significant.
RESULTS: In the range of illuminances tested, the amplitude of accommodation decreased on average from 6.34
to 4.35 D in the young subjects and from 1.69 to 1.04 D in the presbyopic subjects. Illuminance was associated
with the amplitude of accommodation in both young and presbyopic groups, with P < .01.
CONCLUSIONS: The reduction in the amplitude of accommodation with target illumination (a phenomenon
named night presbyopia) under photopic light conditions is not only due to a reduction in the depth of focus as
a consequence of pupil dilation; it is strongly affected by the decrease of retinal illuminationPermalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire