Navegando por Palavras-chave "biometria óptica"

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    Estudo comparativo de três biômetros ópticos
    (Universidade Federal de São Paulo (UNIFESP), 2016-01-27) Lopes, Yara Cristina [UNIFESP]; Allemann, Norma [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Objective: To compare the performance of three optical biometers, IOLMaster (gold standard), Lenstar and AL-Scan, with emphasis on diseases commonly encountered in clinical practice. Methods: Measurements were performed in 95 eyes, 95 patients, aged between 4 and 90 years using the optical biometers: IOLMaster, Lenstar and AL-Scan, referred from different services from the Department of Ophthalmology at UNIFESP, maintaining in the group the most commonly disorders found in clinical practice. Results: Five parameters were compared in eyes with ocular pathologies: axial length, keratometric values, anterior chamber depth, corneal thickness, and white-to-white distance. Bland-Altman analysis of concordance demonstrated agreement between measurements obtained by IOL Master and Lenstar for axial length; and between IOL Master and AL-Scan for axial length and keratometry. The comparison of the measurements of the other parameters obtained with Lenstar and AL-Scan with gold standard IOLMaster showed significant bias. Comparing Lenstar and AL-Scan, the bias was significant only for the white-to-white distance, and measurements showed agreement for the other parameters,. Conclusions: We can conclude that the axial length measurements undertaken by Lenstar equipment can replace the ones carried out by IOLMaster; and axial length and keratometry measurements performed by AL-Scan can replace those supplied by IOLMaster. This conclusion was based only on statistical and non-clinical criteria, and one should take into account that cases with pathologies were included in this sample.