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Year : 2018  |  Volume : 66  |  Issue : 6  |  Page : 806-811

Accuracy of noncycloplegic refraction performed at school screening camps

1 Department of Paediatric Ophthalmology and Strabismus, Dr. Shroff's Charity Eye Hospital, New Delhi, India
2 Department of Ophthalmology, BHRC-Dr. Shroff Charity Eye Hospital, Mathura, Uttar Pradesh, India
3 Department of Ophthalmology, Binh Dinh Eye Hospital, Qui Nhon, Vietnam, Asia, India
4 Department of Community Ophthalmology, Dr. Shroff's Charity Eye Hospital, New Delhi, India

Correspondence Address:
Dr . Shailja Tibrewal
Dr. Shroff's Charity Eye Hospital, Daryaganj, New Delhi - 110 002
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijo.IJO_982_17

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Purpose: The aim of this study was to compare noncycloplegic refraction performed in school camp with that performed in eye clinic in children aged 6–16 years. Methods: A prospective study of children with unaided vision <0.2 LogMAR who underwent noncycloplegic retinoscopy (NCR) and subjective refraction (SR) in camp and subsequently in eye clinic between February and March 2017 was performed. A masked optometrist performed refractions in both settings. The agreement between refraction values obtained at both settings was compared using the Bland–Altman analysis. Results: A total of 217 eyes were included in this study. Between the school camp and eye clinic, the mean absolute error ± standard deviation in spherical equivalent (SE) of NCR was 0.33 ± 0.4D and that of SR was 0.26 ± 0.5D. The limits of agreement for NCR were +0.91D to − 1.09D and for SR was +1.15D to -1.06D. The mean absolute error in SE was ≤0.5D in 92.62% eyes (95% confidence interval 88%–95%). Conclusion: A certain degree of variability exists between noncycloplegic refraction done in school camps and eye clinic. It was found to be accurate within 0.5D of SE in 92.62% eyes for refractive errors up to 4.5D of myopia, 3D of cylinder, and 1.5D of hyperopia.

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