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- W1973749305 abstract "<h3>Background:</h3> The Plusoptix Vision Screener (PVS) is a new non-cycloplegic videoretinoscopy autorefractor. Refractive accuracy may affect its performance as a screening tool. <h3>Aims:</h3> Study 1: To determine the intra- and interobserver variability of PVS measurements. Study 2: To compare PVS measurements with gold-standard manual cycloplegic retinoscopy (MCR). <h3>Methods:</h3> Study 1: PVS refraction of 103 children with mean (SD) age 5.5 (0.6) years by two observers. Study 2: PVS and MCR refraction of 126 children with mean (SD) age 5.5 (1.5) years, including 43 children with manifest strabismus ⩾5 PD, comparing mean spherical equivalent (MSE) and Jackson cross cylinders J<sub>0</sub> and J<sub>45</sub>. <h3>Results:</h3> Study 1: Repeatability coefficients (observer 1): MSE: 0.63 D, J<sub>0</sub>: 0.24 D, J<sub>45</sub>: 0.18 D; those of observer 2 were nearly identical. The mean difference (95% limits of agreement) between the two observers for MSE, J<sub>0</sub> and J<sub>45</sub> were, respectively, 0.03 (−0.62 to 0.68 D), −0.008 (−0.25 to 0.23 D) and 0.013 (−0.18 to 0.20) D. Study 2: MSE tended to be lower on PVS than MCR, with differences of up to 8.00 D. Less than 20% of values were within ±0.50 D of each other. Agreement was better for J<sub>0</sub> and J<sub>45</sub>. Strabismus was associated with an odds ratio of 3.7 (95% CI 1.3 to 10.5) of the PVS failing to obtain a reading. <h3>Conclusions:</h3> The PVS may underestimate children’s refractive error." @default.
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- W1973749305 date "2008-11-10" @default.
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- W1973749305 title "Plusoptix Vision Screener: the accuracy and repeatability of refractive measurements using a new autorefractor" @default.
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- W1973749305 doi "https://doi.org/10.1136/bjo.2008.138123" @default.
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