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Auteur Matthew J. Kauffman
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la rechercheCase Report: What Are We Doing for Our “20/20 Unhappy” Scleral Lens Patients? / Lan Chi Nguyen in OVS : Optometry & Vision Science, vol. 97, 09 (Septembre 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 09 (Septembre 2020)
Titre : Case Report: What Are We Doing for Our “20/20 Unhappy” Scleral Lens Patients? Type de document : article de périodique Auteurs : Lan Chi Nguyen ; Matthew J. Kauffman ; Gareth D. Hastings ; Raymond A Applegate ; Jason Marsack Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Acuité visuelle
[Thésaurus HELB]:Optique:lentilles sclérales
[Thésaurus HELB]:Paramédical:correction de la déficience visuelle
[Thésaurus HELB]:Paramédical:Satisfaction des patientsRésumé : SIGNIFICANCE: Scleral lenses (SLs) partially mask higher-order aberrations (HOAs) in highly aberrated eyes. Although visual acuity (VA) may show satisfactory quantitative clinical outcomes during SL wear, residual (uncorrected) HOAs can leave subjective visual quality goals unmet. PURPOSE: The purpose of this study was to report a case where a “20/20 unhappy” patient with SLs was able to meet visual goals with wavefront-guided SLs. CASE REPORT: A 40-year-old male with bilateral keratoconus, whose Snellen VA with SLs was 20/20+2 right eye (OD) 20/16+2 left eye (OS), reported halos and glare at night and perceptual smearing. When viewing a point of light, a “Ferris wheel” shadowing was observed OD and a U-shaped shadowing OS. Residual higher-order root mean square wavefront error was 0.49 μm OD and 0.39 μm OS; visual image quality measured by visual Strehl ratio was 0.067 OD and 0.092 OS (pupil size, 4.00 mm). Wavefront-guided SLs reduced residual higher-order root mean square to 0.19 μm OD and 0.25 μm OS, VA improved to 20/10 OD and 20/13 OS, and visual Strehl improved to 0.150 OD and 0.121 OS. The patient reported reduced smearing, shadowing, and night vision concerns, meeting his visual expectations and goals. CONCLUSIONS: Wavefront sensing quantifies both lower and HOAs, which can cause visual dissatisfaction in individuals with highly aberrated eyes, despite sometimes reaching typical levels of VA. As wavefront-guided SLs targeting these residual aberrations to improve visual image quality become more available, they should be considered for 20/20 unhappy patients when conventional clinical options are unsatisfactory. 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: 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 Quantifying the Optical and Physical Consequences of Daily Cleaning on Conventional and Wavefront-guided Scleral Lenses / Sarah M. Horwitz in OVS : Optometry & Vision Science, vol. 97, 09 (Septembre 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 09 (Septembre 2020)
Titre : Quantifying the Optical and Physical Consequences of Daily Cleaning on Conventional and Wavefront-guided Scleral Lenses Type de document : article de périodique Auteurs : Sarah M. Horwitz ; Gareth D. Hastings ; Lan Chi Nguyen ; Matthew J. Kauffman ; Chuan Hu ; Sujata Rijal Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Paramédical:Lentille scérale
[Thésaurus Mesh]Solutions ophtalmiques
[Thésaurus Mesh]Tests de visionRésumé : SIGNIFICANCE: An equivalent 12 months of cleaning did not induce significant changes in the optical aberrations or base curves of scleral lenses. PURPOSE: This study aimed to test whether an equivalent of 12 months of manual cleaning alters the optical and physical properties of conventional and wavefront-guided scleral lenses. METHODS: Twelve scleral lenses (four repeats of three designs, termed A, B, and C) were manufactured in Boston XO material: design A, −5.00 D defocus; design B, −5.00 D defocus with −0.153-μm vertical coma; and design C, −5.00 D defocus with a full custom wavefront-guided correction (second to fifth Zernike radial orders) of an eye with severe keratoconus. One lens of each design group served as a control and was not cleaned. To simulate a year of cleaning, seven individuals cleaned nine lenses (three from each group) twice a day for 27 days using the palm technique and commercially available cleaners, resulting in 378 cleanings of each lens. Lens aberrations were optically profiled and base curve radii were measured at baseline and after every 42nd cleaning. Differences in higher-order root mean square (HORMS) wavefront error and base curve radii associated with cleaning were compared with clinical benchmarks and using sign tests. RESULTS: For the experimental lenses, median change in Seidel spherical dioptric power was +0.01 D (maximum, +0.025 D). Median change in HORMS wavefront error was 0.013 μm (maximum, 0.019 μm). All lenses exhibited HORMS changes less than one-eighth equivalent diopters (P = .002). Median percentage change in HORMS wavefront error in the three wavefront-guided lenses was 0.96% (maximum, 1.25%). Median change in base curve radii was 0.00 mm, with all lenses exhibiting changes (P = .002), less than the American National Standards Institute tolerance of 0.05 mm. CONCLUSIONS: Cleaning over an equivalent 12-month period did not induce clinically significant changes in the optical or base curve properties of conventional or wavefront-guided scleral lenses. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire The Impact of Misaligned Wavefront-guided Correction in a Scleral Lens for the Highly Aberrated Eye / Sujata Rijal in OVS : Optometry & Vision Science, vol. 97, 09 (Septembre 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 09 (Septembre 2020)
Titre : The Impact of Misaligned Wavefront-guided Correction in a Scleral Lens for the Highly Aberrated Eye Type de document : article de périodique Auteurs : Sujata Rijal ; Lan Chi Nguyen ; Matthew J. Kauffman ; Raymond A Applegate ; Jason Marsack Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Vision oculaire
[Thésaurus HELB]:Optique:lentilles sclérales
[Thésaurus HELB]:Optique:port de lentilles de contact
[Thésaurus HELB]:Paramédical:correction de la déficience visuelleRésumé : SIGNIFICANCE: To achieve maximum visual benefit, wavefront-guided scleral lens corrections (WGCs) are aligned with the underlying wavefront error of each individual eye. This requirement adds complexity to the fitting process. With a view toward simplification in lens fitting, this study quantified the consequences of placing WGCs at two pre-defined locations. PURPOSE: This study aimed to quantify performance reduction accompanying the placement of the WGC at two locations: (1) the average decentered location (ADL; average decentration observed across individuals wearing scleral lenses) and (2) the geometric center (GC) of the lens. METHODS: Deidentified residual aberration and lens translation data from 36 conventional scleral lens–wearing eyes with corneal ectasia were used to simulate WGC correction in silico. The WGCs were decentered from the eye-specific pupil position to both the ADL and GC locations. The impact of these misalignments was assessed in terms of change (from the aligned, eye-specific pupil position) in higher-order root mean square (HORMS) wavefront error, change in log of the visual Strehl ratio (logVSX), and predicted change in logMAR visual acuity (VA). RESULTS: As expected, HORMS increased, logVSX decreased, and predicted VA was poorer at both ADL and GC compared with the aligned condition (P < .001). Thirty-four of 36 eyes had greater residual HORMS, and 33 of 36 eyes had worse logVSX values at the GC than at the ADL. In clinical terms, 19 of 36 eyes at the ADL and 35 of 36 eyes at the GC had a predicted loss in VA of three letters or greater. CONCLUSIONS: The placement of the WGC at either ADL or GC is predicted to lead to a noticeable reduction in VA for more than half of the eyes studied, suggesting the simplification of the fitting process is not worth the cost in performance Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire