Near binocular visual function in young adult orthokeratology versus soft contact lens wearers.pdfVIP

Near binocular visual function in young adult orthokeratology versus soft contact lens wearers.pdf

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Near binocular visual function in young adult orthokeratology versus soft contact lens wearers.pdf

G Model CLAE 939 No. of Pages 6 Contact Lens and Anterior Eye xxx (2016) xxx–xxx Contents lists available at ScienceDirect Contact Lens and Anterior Eye journal homepage: /locate/clae Near binocular visual function in young adult orthokeratology versus soft contact lens wearers Kate Gifforda,*, Paul Giffordb, Peter L. Hendicotta, Katrina L. Schmida a School of Optometry and Vision Science, Faculty of Health, Institute of Health and Biomedical Innovation, Queensland University of Technology,60 Musk Avenue, Kelvin Grove, QLD 4059 Australia b School of Optometry and Vision Science, Faculty of Science, Rupert Myers Building, Barker Street, Kensington, NSW 2033 Australia ARTICLE INFO Article history: Received 11 October 2016 Received in revised form 5 December 2016 Accepted 10 January 2017 Keywords: Accommodation Binocular vision Contact lenses Myopia Orthokeratology Heterophoria ABSTRACT Purpose: To compare near point binocular vision function of young adult myopes wearing orthokeratology (OK) lenses to matched single vision soft disposable contact lens (SCL) wearers. Methods: A retrospective clinical record analysis of all OK wearers (18–30 years) presenting over an 18 month period was undertaken. Data was extracted for 17 OK wearers, with 17 SCL wearers matched for age, refractive error and duration of contact lens wear. Binocular vision data included horizontal phoria (phoria), horizontal base-in (BIFR) and base-out fusional reserves (BOFR) and accommodation accuracy (AA). Results: The OK group was 25.8 ? 3.2 years, with a duration of wear of 45.7 ? 25 months and refractive error of R à2.09 ? 1.23D, L à2.00 ? 1.35D. Compared to matched SCL wearers the OK group were signi?cantly more exophoric (OK à2.05 ? 2.38D; SCL 0.00 ? 1.46D, p = 0.005) and had better accommodation accuracy (OK 0.97 ? 0.33D; SCL 1.28 ? 0.32D, p = 0.009). BIFR and BOFR were not different in the two groups. Frequency histograms showed that more SCL wearers had high lags of accommodation (AA ! 1.50D:

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