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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
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Aberrometry Repeatability and Agreement with Autorefraction.

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Summary

The Discovery System demonstrates excellent repeatability for measuring refractive error and aberrations in adults. Minor differences were observed when compared to the Grand Seiko autorefractor.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Aberrometers are crucial for clinical research on refractive error and visual quality.
  • The Discovery System offers data export for research, necessitating performance evaluation.

Purpose of the Study:

  • Assess the repeatability of refractive error and higher-order aberration measurements using the Discovery System.
  • Examine the agreement between the Discovery System and the Grand Seiko WAM-5500 autorefractor for refractive error.

Main Methods:

  • Bland-Altman analysis evaluated between-visit repeatability and agreement.
  • Refractive error data were converted to power vectors (M, J0, J45).
  • Zernike coefficients and RMS values were calculated for higher-order aberrations.

Main Results:

  • The Discovery System showed high repeatability for refractive error and aberrations (P > .30).
  • Repeatability for defocus and higher-order RMS were ±0.31 D and ±0.095 microm (6-mm pupil).
  • Slight, statistically significant differences were noted between the Discovery System and Grand Seiko for refractive error components at a 3-mm pupil (P < .005).

Conclusions:

  • The Discovery System is a reliable instrument for measuring refractive error and higher-order aberrations in adults.
  • The study identified minor discrepancies in refractive error measurements between the two devices.