Determinants of subjective patient-reported quality of vision after small-incision lenticule extraction

Schmelter, Valerie; Dirisamer, Martin; Shajari, Mehdi; Kreutzer, Thomas C.; Mayer, Wolfgang J.; Priglinger, Siegfried; Luft, Nikolaus

doi:10.1016/j.jcrs.2019.06.012

Cited by 20 publications

(14 citation statements)

References 25 publications

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“…Interestingly, the present study did not reveal any relevant coherence between SMILE-induced HOAs with subjectively reported visual quality as assessed with the QOV questionnaire, a validated PRO instrument gauging: overall visual symptom frequency, severity and bothering effect (McAlinden et al 2010). In contrast, statistically significance was found for associations between corneal HOAs and three of the six most commonly reported (Schmelter et al 2019). Visual symptoms after SMILE.…”

Section: Discussioncontrasting

confidence: 93%

“…The most commonly reported visual symptoms were fluctuation in vision and glare: a cumulative of 73.3% and 65.5% of patients reported these symptoms either ‘occasionally’, ‘quite often’ or ‘very often’. Fluctuation in vision and glare was also concordantly perceived as the most severe and the most bothersome postoperative visual disturbances (Schmelter et al 2019).…”

Section: Resultsmentioning

confidence: 99%

“…Incorporating all 10 tested visual symptoms, the proprietary QOV scores represent linear‐scaled measures of the three dimensions of visual disturbance in general and can range from 0 (=no disturbance) to 100 (=maximum disturbance). In addition, the six most commonly reported long‐term visual symptoms after SMILE (fluctuations in vision, glare, starburst, focusing difficulties, haloes and blurred vision; all with a prevalence of ≥37% (Schmelter et al 2019) were analysed for potential associations with corneal HOAs as described below.…”

Section: Methodsmentioning

confidence: 99%

“…Our group recently characterized the subjective QOV and the incidence of long‐term visual symptoms after SMILE for treatment of myopia and myopic astigmatism (Schmelter et al 2019). The purpose of the present study was to analyse in depth the relationship between objectively measured corneal HOAs and subjectively perceived visual disturbances after SMILE as quantified with the standardized and clinically validated QOV questionnaire (McAlinden et al 2010) in a large sample of SMILE patients.…”

Section: Introductionmentioning

confidence: 99%

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Corneal wavefront aberrations and subjective quality of vision after small incision lenticule extraction

Schmelter

Schworm

Mayer

et al. 2020

Acta Ophthalmologica

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To analyse in depth the associations between objectively measured corneal higher-order aberrations (HOAs) and subjectively perceived visual quality after small incision lenticule extraction (SMILE) as quantified with the standardized and clinically validated quality of vision (QOV) questionnaire. Methods: This cross-sectional study included patients after bilateral simultaneous SMILE for the treatment of myopia and/or myopic astigmatism with plano target refraction. Scheimpflug imaging (Pentacam HR; Oculus Optikger€ ate GmbH, Wetzlar, Germany) was used to objectively quantify corneal HOAs. The standardized and validated QOV questionnaire was employed to gauge patients' subjectively perceived visual quality regarding frequency, severity and bothering effect of visual disturbances. Results: A total of 394 eyes of 197 patients with a mean age of 32.4 AE 7.7 years and a mean postoperative follow-up of 24.3 AE 14.1 months were included. SMILE induced a statistically significant (p < 0.001) increase in spherical aberration (0.074 AE 0.131 µm), coma (0.142 AE 0.179 µm), trefoil (0.018 AE 0.067 µm) as well as in total HOAs (0.191 AE 0.176 µm). Surgically induced and postoperative levels of HOA showed no correlation with the three QOV scores representative of overall visual symptom frequency, severity and bothering effect (all R 2 values ≤ 0.016). In addition, the associations between specific visual symptoms (e.g. starburst) and singular HOA terms (e.g. haloes) were very weak (all Rho values ≤ 0.164). Conclusions: Small incision lenticule extraction induced significant amounts of corneal HOAs that, however, showed no clear relationships to patient-reported QOV or specific long-term visual symptoms.

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Section: Discussioncontrasting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Corneal wavefront aberrations and subjective quality of vision after small incision lenticule extraction

Schmelter

Schworm

Mayer

et al. 2020

Acta Ophthalmologica

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“…21,23 Many studies have explored the relationship between patient-reported outcomes (PROs) and clinical parameters. [30][31][32][33] Although the relationship seems complex, PROs have been proved to be an effective measure of visual function in patients. The IND-VFQ-31-CN and IND-VFQ-GF-19-CN scores are both weakly correlated to visual acuity, consistent with our previous research about other instruments, 34,35 indicating that PROs and visual acuity were inter-related and mutually complementary.…”

Section: Discussionmentioning

confidence: 99%

Psychometric Assessment of the Chinese Version of the Indian Vision Functioning Questionnaire Based on the Method of Successive Dichotomizations

Chen

Yan

et al. 2021

Trans. Vis. Sci. Tech.

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The purpose of this study was to assess whether a Chinese translated version of the 33-item Indian Vision Function Questionnaire (IND-VFQ-33) forms a valid measurement scale and to evaluate its psychometric properties based on the method of successive dichotomizations (MSD). Methods:The English version of the IND-VFQ-33 was translated, back translated, and cross-culturally adapted for use in China. It was interviewer administered to patients with cataracts. MSD, a polytomous Rasch model that estimates ordered thresholds, was used to assess and optimize psychometric properties of the overall scale and three subscales separately.Results: One hundred and seventy-nine patients provided complete responses. After the removal of 2 misfitting items, a revised 31-item overall scale demonstrated adequate precision (person reliability [PR] = 0.92) and no misfitting items. The general functioning subscale fit the MSD model well after removing two misfitting items. The psychosocial impact subscale and the visual symptoms subscale were not considered further due to poor measurement precision. After addressing psychometric deficiencies, a 31-item overall scale (IND-VFQ-31-CN) and a 19-item general functioning subscale (IND-VFQ-GF-19-CN) were developed. Conclusions:The original IND-VFQ-33 required re-engineering to form valid measures for use in China. The revised overall scale and general functioning subscale demonstrated adequate MSD based psychometric properties. Translational Relevance:The revised IND-VFQ-33 is a valid patient-reported outcome assessment for Chinese patients with cataract based on MSD analysis.

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Subjective patient-reported visual quality after small-incision lenticule extraction and its correlation to the objective one

Zhang,

Yuan,

Zhang

et al. 2023

Int Ophthalmol

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Determinants of subjective patient-reported quality of vision after small-incision lenticule extraction

Cited by 20 publications

References 25 publications

Corneal wavefront aberrations and subjective quality of vision after small incision lenticule extraction

Corneal wavefront aberrations and subjective quality of vision after small incision lenticule extraction

Psychometric Assessment of the Chinese Version of the Indian Vision Functioning Questionnaire Based on the Method of Successive Dichotomizations

Subjective patient-reported visual quality after small-incision lenticule extraction and its correlation to the objective one

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