May 2003
Volume 44, Issue 13
ARVO Annual Meeting Abstract  |   May 2003
Accuracy of the Grand Seiko Autorefractor in Children
Author Affiliations & Notes
  • C.E. Clifford
    Ophthalmology, University of Arizona, Tucson, AZ, United States
  • E.M. Harvey
    Ophthalmology, Psychology, University of Arizona, Tucson, AZ, United States
  • V. Dobson
    Ophthalmology, Psychology, University of Arizona, Tucson, AZ, United States
  • J.M. Miller
    Ophthalmology, The Optical Sciences Center, University of Arizona, Tucson, AZ, United States
  • Footnotes
    Commercial Relationships  C.E. Clifford, None; E.M. Harvey, None; V. Dobson, None; J.M. Miller, None.
  • Footnotes
    Support  NIH Grant EY13153, Research to Prevent Blindness
Investigative Ophthalmology & Visual Science May 2003, Vol.44, 2793. doi:
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    • Get Citation

      C.E. Clifford, E.M. Harvey, V. Dobson, J.M. Miller; Accuracy of the Grand Seiko Autorefractor in Children . Invest. Ophthalmol. Vis. Sci. 2003;44(13):2793.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract: : Purpose: To evaluate accuracy of the Grand Seiko WR-5100K autorefractor, as compared to cycloplegic refraction with refinement in children. Methods: Subjects were 92 fifth- and sixth-grade children from a population with a high prevalence of astigmatism. Non-cycloplegic autorefraction measurements (based on 10 readings) were obtained with the WR-5100K while subjects viewed an ETDRS letter chart located at 4.0 m. Following non-cycloplegic autorefraction, subjects were cyclopleged (2 drops of cyclopentolate 1%) and refracted using the Nikon Retinomax K+ autorefractor. The cycloplegic autorefraction was then subjectively refined to determine the subject's best estimate of refractive error (BER). Analyses of accuracy compared measurements of the WR-5100K to each child's BER for spherical equivalent (M) and two Jackson crossed cylinder vectors (J0 and J45). Results: Results of cycloplegic refraction with refinement indicated that sphere values ranged from -6.00 D to +3.50 D (mean=-0.44, SD=1.85) and cylinder values ranged from 0 to +5.25 D (mean=+1.45, SD=1.58). The mean difference between measures with the WR-5100K and subject's BER was 0.18 D (SD=0.62), 0.004 D (SD=0.22), and -0.02 D (SD=0.15), for M, J0, and J45, respectively. The difference between the two measurements was significant for M, with WR-5100K measurements slightly less hyperopic than BER (t(91)=2.82, p=0.006). Differences between measurements for J0 and for J45 were not significant. Conclusion: The WR-5100K provided slightly less hyperopic measurements of spherical equivalent than cycloplegic autorefraction with refinement. Measurements of cylinder were in good agreement, even in this highly astigmatic sample of children.

Keywords: refraction • astigmatism 

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