Agreement between Lenstar and Pentacam in Keratometry and Anterior Chamber Depth Measurements

 To compare keratometry and anterior chamber depth (ACD) measurements performed using Lenstar LS 900 (Haag-Streit AG, Switzerland) and the Pentacam (Oculus, Weltzar, Germany) devices in healthy eyes.

Sixty eyes of 30 healthy volunteers were included in this prospective study. Keratometry and ACD measurements were obtained using Lenstar, followed by Pentacam on the same day.  The readings of the two instruments were compared to evaluate their agreement.

The mean age of participants was 40.01 ± 12.29 years (Range 10 to 65years).  The mean ACD was 2.762 ± 0.281 millimeters when measured using Lenstar and 2.801 ± 0.273 millimeters when measured with Pentacam (P = 0.03). The average mean keratometry was 44.45 ± 1.65 diopter when measured with Lenstar and 44.16 ± 1.55 diopter when measured using  Pentacam (P < 0.001). The Bland-Altman plots demonstrated a wide range of inter-device differences in mean keratectomy and also ACD measurements between the two devices.

Our findings suggest that the ACD and keratometry measurements obtained using the Lenstar and Pentacam devices might not be interchangeable.Key words: Anterior Chamber; Cornea; Pentacam; Lenstar.