Citation:Beato JN, Esteves-Leandro J, Reis D, Matos R, Falc?o M, Rosas V, Carneiro ?, Falc?o-Reis F. Agreement between IOLMaster? 500 and Pentacam? HR for keratometry assessment in type 2 diabetic and non-diabetic patients. Int J Ophthalmol 2020;13(6):920-926,doi:10.18240/ijo.2020.06.10
Agreement between IOLMaster? 500 and Pentacam? HR for keratometry assessment in type 2 diabetic and non-diabetic patients
Received:June 28, 2019  Revised:September 27, 2019
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DOI:10.18240/ijo.2020.06.10
Key Words:keratometry  diabetes mellitus  astigmatism  cataract  diabetic retinopathy
Fund Project:Supported by a research grant from the Portuguese Society of Ophthalmology.
                       
AuthorInstitution
Joao N Beato Department of Ophthalmology, S?o Jo?o Hospital, Porto 4200-319, Portugal; Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto 4200-319, Portugal
Joao Esteves-Leandro Department of Ophthalmology, S?o Jo?o Hospital, Porto 4200-319, Portugal
David Reis Faculty of Medicine, University of Porto, Porto 4200-319, Portugal
Rita Matos Department of Ophthalmology, S?o Jo?o Hospital, Porto 4200-319, Portugal
Manuel Falcao Department of Ophthalmology, S?o Jo?o Hospital, Porto 4200-319, Portugal; Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto 4200-319, Portugal
Vítor Rosas Department of Ophthalmology, S?o Jo?o Hospital, Porto 4200-319, Portugal
Angela Carneiro Department of Ophthalmology, S?o Jo?o Hospital, Porto 4200-319, Portugal; Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto 4200-319, Portugal
Fernando Falcao-Reis Department of Ophthalmology, S?o Jo?o Hospital, Porto 4200-319, Portugal; Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto 4200-319, Portugal
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Abstract:
      AIM: To evaluate inter-device agreement of anterior keratometry obtained by the IOLMaster? 500 and Pentacam? HR in type 2 diabetic and non-diabetic patients.

    METHODS: Corneal measurements were sequentially performed in 60 diabetes mellitus (DM) and 48 age and sex-matched controls undergoing cataract surgery. Variables recorded included flat and steep keratometry, mean keratometry (Km), astigmatism magnitude, axis location, J0 and J45 components. Bland-Altman plots and intraclass correlation coefficients were used for examination of agreement. Subgroup analyses were performed for astigmatism magnitude, diabetes duration, hemoglobin A1c (HbA1c) levels and diabetic retinopathy (DR) stage.

    RESULTS: Agreement for Km and astigmatism magnitude were considered good and moderate, with 95% limits of agreement (LoA) of -1.09 to 1.23 diopters (D) and -0.83 to 0.86 D in DM group, respectively; and -0.59 to 0.72 D and -0.98 to 0.75 D in non-DM group, respectively. In contrast, the 95% LoA for corneal axis exceeded the clinically relevant margins in both groups. In the total sample, only 41 eyes (38%) had a smaller than 5-degree difference. Diabetes duration, HbA1c levels and DR stage were not found to significantly affect agreement. Logistic regression showed that higher corneal power (P=0.021) and astigmatism magnitude (P=0.011) were associated with a decreased risk of having a difference in axis location greater than 10-degrees.

    CONCLUSION: In both groups, IOLMaster and Pentacam agree well for corneal power and moderately for astigmatism. However, axis location disagreement is frequent in eyes with flatter corneas and small amounts of astigmatism.

PMC FullText Html:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7270259/
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