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D. Schiano Lomoriello, F. Oddone, M. Parravano, L. Tranchina, P. Ducoli; Reproducibility of Ocular Biometry Using Non Contact Optical Low-Coherence Reflectometer. Invest. Ophthalmol. Vis. Sci. 2010;51(13):5400.
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to assess the reproducibility of biometric measurements performed by LenStar and to investigate the agreement with IOLMaster in normal subjects.Setting: Department of Ophthalmology, Fondazione G.B.Bietti-IRCCS, Rome, Italy.
Each subject underwent 3 measurement sessions either with IOLMaster and LenStar. Axial length (AxL) and anterior chamber depth (ACD) were measured by IOLMaster and AxL, ACD, central corneal thickness (CCT) and lens thickness (LT) were measured by LenStar. To assess and compare repeatability the coefficient of repeatability (CR), coefficient of variation (CV), intraclass correlation coefficients (ICC) with 95% confidence interval (CI) have been calculated. Agreement between average measurements of AxL and ACD by IOLMaster and LenStar was assessed by Bland&Altman plots.
36 consecutive healthy subjects were included in the analysis. Measures of the studied parameters with both devices demonstrated an overall high reproducibility. CV for Axl measurements was 0.08 (95%CI 0.11-0.04) and 0.05 (95%CI 0.06-0.04) with IOLMaster and LenStar respectively with corresponding CR of 0.2% and 0.1%.Agreement between average AxL measurements performed by IOLMaster and LenStar was high with a mean difference of -0.02 mm (95%CI -0.004/-0.008) and limits of agreement of -0.12 (95%CI -0.09/-0.15) and 0.07 (95%CI 0.04-0.1). Agreement between average ACD measurements was low and increased after adding CCT values to ACD measures performed by LenStar.
LenStar is an accurate, fast and highly reproducible instrument that could provide additional informations of interest in the clinical setting of cataract and refractive surgery.
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