Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST
Purpose. To assess the repeatability and reproducibility of dynamic corneal response parameters measured by the Corvis ST (Oculus, Wetzlar, Germany). Methods. One eye randomly selected from 32 healthy volunteers was examined by the Corvis ST. Three different devices were used in an alternated random...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Journal of Ophthalmology |
| Online Access: | http://dx.doi.org/10.1155/2017/8515742 |
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| author | Bernardo T. Lopes Cynthia J. Roberts Ahmed Elsheikh Riccardo Vinciguerra Paolo Vinciguerra Sven Reisdorf Stefanie Berger Robert Koprowski Renato Ambrósio |
| author_facet | Bernardo T. Lopes Cynthia J. Roberts Ahmed Elsheikh Riccardo Vinciguerra Paolo Vinciguerra Sven Reisdorf Stefanie Berger Robert Koprowski Renato Ambrósio |
| author_sort | Bernardo T. Lopes |
| collection | DOAJ |
| description | Purpose. To assess the repeatability and reproducibility of dynamic corneal response parameters measured by the Corvis ST (Oculus, Wetzlar, Germany). Methods. One eye randomly selected from 32 healthy volunteers was examined by the Corvis ST. Three different devices were used in an alternated random order for taking three measurements at each device in each subject. Standard intraocular pressure (IOP), the biomechanical-compensated IOP (bIOP), and DCR parameters were evaluated. The within-subject standard deviation (ζw) and coefficient of variation (CV) were assessed. Results. Regarding pressure indices, the ζw was below 1 mmHg for repeatability (0.98 for IOP and 0.89 for bIOP) and the CV was 6.6% for IOP and 6.1% for bIOP. For reproducibility, the ζw was around 1 mmHg (1.12 for IOP and 1.05 for bIOP) and the CV was 7.6% for IOP and 7.1% for bIOP. Most of DCR indices presented CV for repeatability below 4%. For reproducibility, the CV of most of the indices were below 6%. The deformation amplitude (DA) ratio in 1 mm and integrated radius were below 4% (1.2% and 3.8%, resp.). Conclusions. The Corvis ST showed good precision (repeatability and reproducibility) for IOP measurements and for DCR in healthy eyes. |
| format | Article |
| id | doaj-art-24a228384b714c438dde05683d862e2b |
| institution | Kabale University |
| issn | 2090-004X 2090-0058 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj-art-24a228384b714c438dde05683d862e2b2025-02-03T01:07:53ZengWileyJournal of Ophthalmology2090-004X2090-00582017-01-01201710.1155/2017/85157428515742Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis STBernardo T. Lopes0Cynthia J. Roberts1Ahmed Elsheikh2Riccardo Vinciguerra3Paolo Vinciguerra4Sven Reisdorf5Stefanie Berger6Robert Koprowski7Renato Ambrósio8Rio de Janeiro Corneal Tomography and Biomechanics Study Group, Rio de Janeiro, RJ, BrazilDepartment of Ophthalmology & Visual Science and Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USASchool of Engineering, University of Liverpool, Liverpool, UKDepartment of Surgical Sciences, Division of Ophthalmology, University of Insubria, Varese, ItalyEye Center, Humanitas Clinical and Research Center, Via Manzoni 56, Rozzano, ItalyOCULUS Optikgeräte GmbH, Wetzlar, GermanyOCULUS Optikgeräte GmbH, Wetzlar, GermanyDepartment of Biomedical Computer Systems, Faculty of Computer Science and Materials Science, Institute of Computer Science, University of Silesia, Bedzinska 39, 41-200 Sosnowiec, PolandRio de Janeiro Corneal Tomography and Biomechanics Study Group, Rio de Janeiro, RJ, BrazilPurpose. To assess the repeatability and reproducibility of dynamic corneal response parameters measured by the Corvis ST (Oculus, Wetzlar, Germany). Methods. One eye randomly selected from 32 healthy volunteers was examined by the Corvis ST. Three different devices were used in an alternated random order for taking three measurements at each device in each subject. Standard intraocular pressure (IOP), the biomechanical-compensated IOP (bIOP), and DCR parameters were evaluated. The within-subject standard deviation (ζw) and coefficient of variation (CV) were assessed. Results. Regarding pressure indices, the ζw was below 1 mmHg for repeatability (0.98 for IOP and 0.89 for bIOP) and the CV was 6.6% for IOP and 6.1% for bIOP. For reproducibility, the ζw was around 1 mmHg (1.12 for IOP and 1.05 for bIOP) and the CV was 7.6% for IOP and 7.1% for bIOP. Most of DCR indices presented CV for repeatability below 4%. For reproducibility, the CV of most of the indices were below 6%. The deformation amplitude (DA) ratio in 1 mm and integrated radius were below 4% (1.2% and 3.8%, resp.). Conclusions. The Corvis ST showed good precision (repeatability and reproducibility) for IOP measurements and for DCR in healthy eyes.http://dx.doi.org/10.1155/2017/8515742 |
| spellingShingle | Bernardo T. Lopes Cynthia J. Roberts Ahmed Elsheikh Riccardo Vinciguerra Paolo Vinciguerra Sven Reisdorf Stefanie Berger Robert Koprowski Renato Ambrósio Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST Journal of Ophthalmology |
| title | Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST |
| title_full | Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST |
| title_fullStr | Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST |
| title_full_unstemmed | Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST |
| title_short | Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST |
| title_sort | repeatability and reproducibility of intraocular pressure and dynamic corneal response parameters assessed by the corvis st |
| url | http://dx.doi.org/10.1155/2017/8515742 |
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