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Purpose . To compare anterior corneal keratometry (K) measurements taken by a dual Scheimpflug analyzer and an auto kerato-refractometer.  Methods . Sixty-four normal eyes underwent keratometric measurements with both devices. The repeatability of the auto kerato-refractometer measurements was assessed by calculating the coefficient of variation (COV). The interdevice agreement was evaluated using the Bland-Altman analysis, Pearson correlation coefficient, and paired two-tailed  t -test.  Results . The COV of the flat  K  and steep  K  measurements taken by the auto kerato-refractometer were 0.21% and 0.29%, respectively. There were no significant differences between the steep  K  and average  K  measurements for the Topcon and Galilei devices ( P  = 0.475, and  P  = 0.137, resp.). The Galilei flat  K  values were lower than those of the Topcon ( P  = 0.002). Both of the instruments showed good agreement for all anterior corneal keratometric values. There was a significant linear correlation between the Galilei and Topcon devices for the flat  K  ( r  = 0.989,  P  < 0.0001), steep  K  ( r  = 0.987,  P  < 0.0001), and average  K  values ( r  = 0.994,  P  < 0.0001).  Conclusions . The anterior corneal flat keratometric values were not interchangeable between the Galilei and Topcon devices. However, the measurements of the two instruments showed significant linear correlation with each other.

Comparison of Anterior Corneal Curvature Measurements Using a Galilei Dual Scheimpflug Analyzer and Topcon Auto Kerato-Refractometer