Purpose: To determine the accuracy of the Spot Vision Screener (Welch Allyn, Skaneateles Falls, NY) in children 6 years and older and recommend device thresholds to improve its accuracy for the detection of refractive error. Methods: The Spot Vision Screener results were compared with three gold standard conditions of increasingly narrow refractive error criterion. The sensitivity, specificity, positive predictive value, and negative predictive value of the Spot Vision Screener in detecting each gold standard criterion were calculated. The most accurate threshold setting for each parameter was identified by calculating the area under the curve receiver operating characteristic. Results: The Spot Vision Screener was able to successfully evaluate 313 of 330 children (95%). The sensitivity of the Spot Vision Screener to detect American Association for Pediatric Ophthalmology and Strabismus guidelines for amblyopia risk factors was 89.5% and the specificity was 76.7%. The sensitivity decreased to 80% and the specificity increased to 75.3% with narrower refractive criteria. The sensitivity in detecting refractive criteria improved with the proposed optimized device thresholds. Estimates for the general population indicate that the positive predictive value is reasonable at 52.3% to 61.8%, depending on the stringency of the criteria, with excellent negative predictive values. Conclusions: In school-aged children, the primary screening focus shifts from preventing amblyopia to detecting visual disturbances, including refractive error, that may interfere with academic performance. In this age group, the Spot Vision Screener was an acceptable method of detecting significant refractive error with improved sensitivity with threshold optimization. [ J Pediatr Ophthalmol Strabismus . 2020;57(3):146–153.]

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