Comparison of Horizontal Corneal Diameter Measurements Using the Orbscan IIz and Pentacam HR Systems

Purpose: To compare 2 automated devices for measuring the horizontal corneal diameter [white-to-white (WTW) distance]. Methods: In this prospective comparative case series, the WTW distance was measured by independent examiners using the Pentacam HR and the Orbscan IIz in 101 eyes of 101 healthy refractive surgery candidates. Statistical evaluation was performed using the paired t test, Pearson correlation, and the Bland–Altman method for...