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    Test-retest reproducibility of accommodation measurements gathered in an unselected sample of UK primary school children

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    Publication date
    2012
    Author
    Adler, P.
    Scally, Andy J.
    Barrett, Brendan T.
    Keyword
    Accommodation measurements
    United Kingdom
    Primary school children
    Reproducibility
    Monocular and binocular amplitudes
    Amplitudes of accommodation (AA)
    Peer-Reviewed
    yes
    
    Metadata
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    Abstract
    Purpose To determine the test-retest reproducibility of accommodation measurements gathered in an unselected sample of primary school children. Methods Monocular and binocular amplitudes of accommodation (AA) were collected by five different Testers using the push-up method in an unselected sample of school children (n=137, age: 8.1±2.1-years). Testing was conducted on three occasions (average testing interval: 8-days) in 91.2% of the children. Results The median AA was 19.1D, the variation due to the identity of the Tester was 3.1D (p<0.001) and the within-subject variation (which takes the variation due to Tester identity into account) was 5.2D. Around 75-79% of children exhibited monocular AAs-12D when tested on the first occasion, but more than 90% exhibited an AA-12D when subsequently tested. Around 74-80% of those with an AA<12D on the first occasion had values-12D on subsequent testing even though no treatment had been undertaken. Poorer initial AA measurements were less likely to improve on repeat testing. Conclusions Our results reveal substantial intra-individual variation in AA measurements, raising questions about the usefulness of this test in children aged 4-12-years. We suggest that AA assessment may prove most useful in children in this age range as a pass/fail check for substantially reduced AA, for example, where the AA is <12D. Our sample would suggest that the prevalence of persistently reduced AA may be around 3.2% when tested under binocular conditions and 4-6.4% when tested monocularly.
    URI
    http://hdl.handle.net/10454/6363
    Version
    published version paper
    Citation
    Adler, P., Scally, A. J. and Barrett, B. T. (2012). Test-retest reproducibility of accommodation measurements gathered in an unselected sample of UK primary school children. Br J Ophthalmol, Vol. 97, pp. 592-597
    Link to publisher’s version
    http://dx.doi.org/10.1136/bjophthalmol-2012-302348
    Type
    Article
    Collections
    Life Sciences Publications
    Health Studies Publications

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