The evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study.
<h4>Purpose</h4>To evaluate the outcome of a web-based digital assessment of visual acuity and refractive error, compared to a conventional supervised assessment, in keratoconus patients with complex refractive errors.<h4>Material and methods</h4>Keratoconus patients, aged 18...
Guardado en:
| Autores principales: | , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Public Library of Science (PLoS)
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/7adc57127f7e4f72a8012387bf0aae9e |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:doaj.org-article:7adc57127f7e4f72a8012387bf0aae9e |
|---|---|
| record_format |
dspace |
| spelling |
oai:doaj.org-article:7adc57127f7e4f72a8012387bf0aae9e2021-12-02T20:17:50ZThe evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study.1932-620310.1371/journal.pone.0256087https://doaj.org/article/7adc57127f7e4f72a8012387bf0aae9e2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0256087https://doaj.org/toc/1932-6203<h4>Purpose</h4>To evaluate the outcome of a web-based digital assessment of visual acuity and refractive error, compared to a conventional supervised assessment, in keratoconus patients with complex refractive errors.<h4>Material and methods</h4>Keratoconus patients, aged 18 to 40, with a refractive error between -6 and +4 diopters were considered eligible. An uncorrected visual acuity and an assessment of refractive error was taken web-based (index test) and by manifest refraction (reference test) by an optometrist. Corrected visual acuity was assessed with the prescription derived from both the web-based tool and the manifest refraction. Non-inferiority was defined as the 95% limits-of-agreement (95%LoA) of the differences in spherical equivalent between the index and reference test not exceeding +/- 0.5 diopters. Agreement was assessed by a Bland-Altman analyses.<h4>Results</h4>A total of 100 eyes of 50 patients were examined. The overall mean difference of the uncorrected visual acuity measured -0.01 LogMAR (95%LoA:-0.63-0.60). The variability of the differences decreased in the better uncorrected visual acuity subgroup (95%LoA:-0.25-0.55). The overall mean difference in spherical equivalent between the index and reference test exceeded the non-inferiority margin: -0.58D (95%LoA:-4.49-3.33, P = 0.008). The mean differences for myopic and hyperopic subjects were 0.09 diopters (P = 0.675) and -2.06 diopters (P<0.001), respectively. The corrected visual acuities attained with the web-based derived prescription underachieved significantly (0.22±0.32 logMAR vs. -0.01±0.13 LogMAR, P <0.001).<h4>Conclusions</h4>Regarding visual acuity, the web-based tool shows promising results for remotely assessing visual acuity in keratoconus patients, particularly for subjects within a better visual acuity range. This could provide physicians with a quantifiable outcome to enhance teleconsultations, especially relevant when access to health care is limited. Regarding the assessment of the refractive error, the web-based tool was found to be inferior to the manifest refraction in keratoconus patients. This study underlines the importance of validating digital tools and could serve to increase overall safety of the web-based assessments by better identification of outlier cases.Marc B MuijzerJanneau L J ClaessensFrancesco CassanoDaniel A GodefrooijYves F D M PrevooRobert P L WissePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 8, p e0256087 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Medicine R Science Q |
| spellingShingle |
Medicine R Science Q Marc B Muijzer Janneau L J Claessens Francesco Cassano Daniel A Godefrooij Yves F D M Prevoo Robert P L Wisse The evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study. |
| description |
<h4>Purpose</h4>To evaluate the outcome of a web-based digital assessment of visual acuity and refractive error, compared to a conventional supervised assessment, in keratoconus patients with complex refractive errors.<h4>Material and methods</h4>Keratoconus patients, aged 18 to 40, with a refractive error between -6 and +4 diopters were considered eligible. An uncorrected visual acuity and an assessment of refractive error was taken web-based (index test) and by manifest refraction (reference test) by an optometrist. Corrected visual acuity was assessed with the prescription derived from both the web-based tool and the manifest refraction. Non-inferiority was defined as the 95% limits-of-agreement (95%LoA) of the differences in spherical equivalent between the index and reference test not exceeding +/- 0.5 diopters. Agreement was assessed by a Bland-Altman analyses.<h4>Results</h4>A total of 100 eyes of 50 patients were examined. The overall mean difference of the uncorrected visual acuity measured -0.01 LogMAR (95%LoA:-0.63-0.60). The variability of the differences decreased in the better uncorrected visual acuity subgroup (95%LoA:-0.25-0.55). The overall mean difference in spherical equivalent between the index and reference test exceeded the non-inferiority margin: -0.58D (95%LoA:-4.49-3.33, P = 0.008). The mean differences for myopic and hyperopic subjects were 0.09 diopters (P = 0.675) and -2.06 diopters (P<0.001), respectively. The corrected visual acuities attained with the web-based derived prescription underachieved significantly (0.22±0.32 logMAR vs. -0.01±0.13 LogMAR, P <0.001).<h4>Conclusions</h4>Regarding visual acuity, the web-based tool shows promising results for remotely assessing visual acuity in keratoconus patients, particularly for subjects within a better visual acuity range. This could provide physicians with a quantifiable outcome to enhance teleconsultations, especially relevant when access to health care is limited. Regarding the assessment of the refractive error, the web-based tool was found to be inferior to the manifest refraction in keratoconus patients. This study underlines the importance of validating digital tools and could serve to increase overall safety of the web-based assessments by better identification of outlier cases. |
| format |
article |
| author |
Marc B Muijzer Janneau L J Claessens Francesco Cassano Daniel A Godefrooij Yves F D M Prevoo Robert P L Wisse |
| author_facet |
Marc B Muijzer Janneau L J Claessens Francesco Cassano Daniel A Godefrooij Yves F D M Prevoo Robert P L Wisse |
| author_sort |
Marc B Muijzer |
| title |
The evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study. |
| title_short |
The evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study. |
| title_full |
The evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study. |
| title_fullStr |
The evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study. |
| title_full_unstemmed |
The evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: A method comparison study. |
| title_sort |
evaluation of a web-based tool for measuring the uncorrected visual acuity and refractive error in keratoconus eyes: a method comparison study. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2021 |
| url |
https://doaj.org/article/7adc57127f7e4f72a8012387bf0aae9e |
| work_keys_str_mv |
AT marcbmuijzer theevaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT janneauljclaessens theevaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT francescocassano theevaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT danielagodefrooij theevaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT yvesfdmprevoo theevaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT robertplwisse theevaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT marcbmuijzer evaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT janneauljclaessens evaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT francescocassano evaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT danielagodefrooij evaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT yvesfdmprevoo evaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy AT robertplwisse evaluationofawebbasedtoolformeasuringtheuncorrectedvisualacuityandrefractiveerrorinkeratoconuseyesamethodcomparisonstudy |
| _version_ |
1718374352390455296 |