Measurement Of Off-Axis Refractive Error With The Grand Seiko WR-5100K Autorefractor.

PURPOSE. To investigate ifthe Grand Seiko WR-5100K autorefractor will take measurements at positions of 10°, 20°, and 30° ofhorizontal eccentricity, and if it does, is
measurement error induced. METHODS. A series of distance measurements were taken at varying degrees of off-axis positions to the right and to the left of the line of sight at increments of 10°, 20°, and 30° and compared to the primary gaze baseline measurement. RESULTS. Readings were successfully taken at 10°, 20°, and 30° from primary position,
with readings of increased eccentricity showing increased variability. CONCLUSION. Care needs to be taken to assure proper patient alignment so that measurements taken are accurate.