Effect of examiner experience and technique on the alternate cover test.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
Heather A AndersonJasmine A Irani

Abstract

To compare the repeatability of the alternate cover test between experienced and inexperienced examiners and the effects of dissociation time and examiner bias. Two sites each had an experienced examiner train 10 subjects (inexperienced examiners) to perform short and long dissociation time alternate cover test protocols at near. Each site conducted testing sessions with an examiner triad (experienced examiner and two inexperienced examiners) who were masked to each other's results. Each triad performed the alternate cover test on 24 patients using both dissociation protocols. In an attempt to introduce bias, each of the paired inexperienced examiners was given a different graph of phoria distribution for the general population. Analysis techniques that adjust for correlations introduced when multiple measurements are obtained on the same patient were used to investigate the effect of examiner and dissociation time on each outcome. The range of measured deviations spanned 27.5 prism diopters (Δ) base-in to 17.5Δ base-out. The absolute mean difference between experienced and inexperienced examiners was 2.28 ± 2.4Δ and at least 60% of differences were ≤2Δ. Larger deviations were measured with the long dissociation protocol for bo...Continue Reading

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Citations

Sep 3, 2013·Journal of Ophthalmology·Pilar Cacho-MartínezMaría Teresa Ruiz-Cantero
Dec 14, 2019·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Martin Ming-Leung MaXiang Chen
Nov 2, 2018·PloS One·Clara MestreJaume Pujol
Aug 25, 2020·Translational Vision Science & Technology·Liat Gantz, Avi Caspi
Aug 18, 2020·BioMed Research International·María Carmen Sánchez-GonzálezManuel Rebollo-Salas
Dec 7, 2016·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Mary E TroyerT Rowan Candy
May 17, 2017·Journal of Pediatric Ophthalmology and Strabismus·Derek P BitnerR Michael Siatkowski
Feb 23, 2019·BMC Ophthalmology·Amélia F NunesAntónio S Nunes
Nov 13, 2020·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Martin Ming-Leung MaXiang Chen
Apr 16, 2021·Current Eye Research·Stephanie Suzanne S GarciaPrincess Mae C Directo

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