Comparison of the biometric measurements obtained using the Lenstar, Pentacam and ultrasound pachymetry methods in cataract patients

Abstract

AIM: To compare the central corneal thickness(CCT), keratometry(K)reading, anterior chamber depth(ACD), and axial length(AL)measured with Lenstar and Pentacam with those obtained with the ultrasound(US)pachymetry in the cataract patients.METHODS: A total of 158 eyes of 158 patients were examined in this study. The CCT, average K, ACD and AL obtained by Lenstar and/or Pentacam were compared with those obtained from US pachymetry using repeated-measures analysis of variance, Pearson correlation coefficients and Bland-Altman analyses.RESULTS: The mean CCT obtained using Lenstar and Pentacam were 536.54±27.90μm and 541.46±29.85μm(t=-5.439; Pt=-0.348, P>0.05). The mean ACD measured using the Pentacam, Lenstar, and US pachymetry were 2.73±0.38mm, 2.71±0.38mm, and 2.85±0.40 mm, respectively(F=309.94, Pr=0.989, 0.978, and 0.977; Pt=-19.482, Pr=0.996; PCONCLUSION: Although there were statistically significant differences, the measurements obtained by the Lenstar and the Pentacam were highly repeatable and the instruments easy to use.

Keywords

• biometry
• Lenstar
• Pentacam
• ultrasound pachymetry
• agreement