Comparison of reliability and repeatability of corneal curvature assessment with six keratometers
dc.contributor.author | Hamer, CA | |
dc.contributor.author | Buckhurst, Hetal | |
dc.contributor.author | Purslow, C | |
dc.contributor.author | Shum, GL | |
dc.contributor.author | Habib, NE | |
dc.contributor.author | Buckhurst, P | |
dc.date.accessioned | 2016-09-15T22:45:19Z | |
dc.date.available | 2016-09-15T22:45:19Z | |
dc.date.issued | 2016-11 | |
dc.identifier.issn | 0816-4622 | |
dc.identifier.issn | 1444-0938 | |
dc.identifier.uri | http://hdl.handle.net/10026.1/5453 | |
dc.description.abstract |
BACKGROUND: Keratometric methodology varies between instruments and the differences may have a clinical impact. We investigated the agreement and reproducibility of six keratometers. METHODS: Keratometry was performed on 100 subjects at two separate sessions with IOLMaster 500, Pentacam, OPD scanner, Medmont E300, Javal-Schiøtz and TMS-5. A second observer assessed 30 subjects to determine inter-observer variability. A single individual was assessed on 10 separate sessions to determine intra-observer variability. Data were analysed using coefficient of variation (CV) and intra-class correlation coefficient (ICCC) for intra-observer variation. Inter-observer concordance was evaluated by the ICCC. Bland-Altman plots, Pearson's correlation coefficient and repeated measures analysis of variance were used to assess agreement of data produced by the instruments. RESULTS: OPD scanner and Javal-Schiøtz mean spherical equivalent (MSE) results were systematically different (p < 0.001) from other instruments (flatter and steeper, respectively). J0 /J45 were similar for all instruments (p < 0.05). Bland-Altman comparison plots indicated that Pentacam and IOLMaster demonstrated greatest level of agreement (ICC results MSE = 0.992, J0 = 0.934 and J45 = 0.890). Agreement (ICC) between observers for MSE ranged from 0.955 to 0.995 for all instruments; lower levels of agreement were found for J0 /J45 (0.289 to 0.901). IOLMaster showed greatest correlation and Medmont the lowest. All instruments showed high intra-observer repeatability of MSE (CV 0.1 to 0.3 per cent). The J0 /J45 readings showed greater variability (CV range 8.8 to 57.6 per cent). CONCLUSION: When considering MSE alone IOLMaster, Pentacam, OPD scan and Medmont may be considered interchangeable; however, assessment of astigmatism shows greater variability between instruments, sessions and observers. | |
dc.format.extent | 583-589 | |
dc.format.medium | Print-Electronic | |
dc.language | en | |
dc.language.iso | en | |
dc.publisher | Informa UK Limited | |
dc.subject | astigmatism | |
dc.subject | corneal curvature | |
dc.subject | corneal topography | |
dc.subject | keratometry | |
dc.title | Comparison of reliability and repeatability of corneal curvature assessment with six keratometers | |
dc.type | journal-article | |
dc.type | Comparative Study | |
dc.type | Journal Article | |
plymouth.author-url | https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000640496600016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008 | |
plymouth.issue | 6 | |
plymouth.volume | 99 | |
plymouth.publication-status | Published | |
plymouth.journal | Clinical and Experimental Optometry | |
dc.identifier.doi | 10.1111/cxo.12329 | |
plymouth.organisational-group | /Plymouth | |
plymouth.organisational-group | /Plymouth/Admin Group - REF | |
plymouth.organisational-group | /Plymouth/Admin Group - REF/REF Admin Group - FoH | |
plymouth.organisational-group | /Plymouth/Faculty of Health | |
plymouth.organisational-group | /Plymouth/Faculty of Health/School of Health Professions | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA/UoA03 Allied Health Professions, Dentistry, Nursing and Pharmacy | |
plymouth.organisational-group | /Plymouth/Research Groups | |
plymouth.organisational-group | /Plymouth/Research Groups/Institute of Health and Community | |
plymouth.organisational-group | /Plymouth/Users by role | |
plymouth.organisational-group | /Plymouth/Users by role/Academics | |
dc.publisher.place | United States | |
dcterms.dateAccepted | 2015-06-21 | |
dc.identifier.eissn | 1444-0938 | |
dc.rights.embargoperiod | Not known | |
rioxxterms.versionofrecord | 10.1111/cxo.12329 | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.licenseref.startdate | 2016-11 | |
rioxxterms.type | Journal Article/Review | |
plymouth.oa-location | http://onlinelibrary.wiley.com/doi/10.1111/cxo.12329/epdf |