Comparison of the biometric measurements obtained using the Anterion and Lenstar devices in cataract patients
First Author: F.Ribeiro PORTUGAL
Co Author(s): T. Ferreira
To compare ocular biometric measurements of a new swept-source optical coherence tomography-based biometer (Anterion, Heidelberg Engineering GmbH) with those of an optical low-coherence reflectometry biometer (Lenstar LS900, Haag-Streit AG), and to compare predicted intraocular lens (IOL) power between the two devices.
Hospital da Luz, Lisbon, Portugal
94 of 94 patients scheduled for cataract surgery were examined with both biometers. Measurements of axial length (AL), minimum keratometry (K1), maximum keratometry (K2), central corneal thickness (CCT), white-to-white (W-W), lens thickness (LT), and pupil diameter (PD). Differences in IOL power were evaluated for the SRK/T, Haigis and Holladay 1 formulas. Agreement between the devices was evaluated using the Pearson correlation coefficient and Bland–Altman plots. Differences were assessed using the paired t-test.
Mean patient age was 67 ± 10 years-old (range 44 to 81). AL measurement was possible in 90 (95.7%) of eyes using the Lenstar and in all the eyes using the Anterion. There were significant differences between the two biometers for the variables AL, CCT, W-W, LT and PD. Correlation coefficients were: AL 1.000, K1 0.966, K2 0.980, CCT 0.977, W-W 0.627, LT 0.788 and PD 0.498. Differences 0.50 D in IOL power between the two devices were observed in 22 (23.4%), 37 (39.4%) and 37 (39.4%) of eyes for the SRK/T, Haigis and Holladay 1 formulas, respectively.
Although correlations in measurements of the two studied biometers were high, there were significant differences in most variables between the two biometers as well as in predited IOL power.