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

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 degrees (nasal and temporal) in 10 degrees 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 hyper-opia. The astigmatic components J0 and J45 were similar between instruments for both central and peripheral refraction.(c) 2021 Spanish General Council of Optometry. Published by Elsevier Espana, S.L.U. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

The purpose of this study was to compare central and peripheral refraction in young children using the Shin-Nippon NVision-K 5001 autorefractor and the COAS-HD VR aberrometer. The results showed that the Shin-Nippon autorefractor measured more hyperopia than the COAS-HD VR for central refraction. The astigmatic components were similar between the two instruments for both central and peripheral refraction.