Multiple measures of refractive state of a test eye making use of a Nidek ARK-10000 OPD-scan

Abstract

Introduction: It is important for the users of automated instruments that measure refractive state to know that the results obtained from such instruments  are  accurate  and  repeatable.  This study was conducted to investigate the repeat-ability of multiple measures of refractive state using a Nidek ARK-10000 OPD-scan.Method:  150  measurements  of  refractive state of a test eye were obtained using an OPD- scan.  The  method  of  focusing  and  triggering the instrument was varied for three sets of 50 measurements.Results:  The  results  of  this  study  suggest that the OPD-scan gives reliable and accurate measures of refractive state when taking mul-tiple measurements. Although the means of the various sets of measurements were significantly different, clinically the differences are probably insignificant.