Comparison of an open view autorefractor with an open view aberrometer in determining peripheral refraction in children

Pelsin Demir , Antonio Filipe Macedo , Ranjay Chakraborty, Karthikeyan Baskaran

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
31 Downloads (Pure)

Abstract

Purpose
The aim of this study was to compare central and peripheral refraction using an open view Shin-Nippon NVision-K 5001 autorefractor and an open view COAS-HD VR aberrometer in young children.

Methods
Cycloplegic central and peripheral autorefraction was measured in the right eye of 123 children aged 8 to 16 years. Three measurements each were obtained with both Shin-Nippon NVision-K 5001 autorefractor and COAS-HD VR aberrometer along the horizontal visual field up to 30° (nasal and temporal) in 10° steps. The refraction from the autorefractor was compared with aberrometer refraction for pupil analysis diameters of 2.5-mm and 5.0-mm.

Results
The Shin-Nippon was 0.30 D more hyperopic than COAS-HD VR at 2.5-mm pupil and 0.50 D more hyperopic than COAS-HD VR at 5-mm pupil for central refraction. For both pupil sizes, the 95% limits of agreement were approximately 0.50 D for central refraction, and limits were wider in the nasal visual field compared to the temporal visual field. The mean difference for both J0 and J45 were within 0.15 D and the 95% limits of agreement within 0.90 D across the horizontal visual field.

Conclusion
Defocus components were similar between the Shin-Nippon autorefractor and the COAS-HD VR aberrometer with a 2.5-mm pupil for most visual field angles. However, there was a significant difference in defocus component between the Shin-Nippon autorefractor and the COAS-HD VR aberrometer with a 5.0-mm pupil, wherein the autorefractor measured more hyperopia. The astigmatic components J0 and J45 were similar between instruments for both central and peripheral refraction.
Original languageEnglish
Pages (from-to)20-29
Number of pages10
JournalJournal of Optometry
Volume16
Issue number1
Early online date10 Jan 2022
DOIs
Publication statusPublished - 1 Jan 2023

Keywords

  • peripheral refraction
  • autorefraction
  • aberrometer
  • refractive error
  • myopia
  • schoolchildren

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