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  • Title: Vision screening in children by Plusoptix Vision Screener compared with gold-standard orthoptic assessment.
    Author: Dahlmann-Noor AH, Vrotsou K, Kostakis V, Brown J, Heath J, Iron A, McGill S, Vivian AJ.
    Journal: Br J Ophthalmol; 2009 Mar; 93(3):342-5. PubMed ID: 19019940.
    Abstract:
    BACKGROUND/AIMS: To evaluate a new autorefractor, the Plusoptix Vision Screener (PVS), as a screening tool to detect risk factors for amblyopia by comparing it with gold-standard orthoptic vision screening in children. METHODS: Community-based screening study including 288 children age 4-7 years who were screened with the PVS and by orthoptic assessment (distance acuity, cover test, extraocular movements, 20 PD prism test, Lang stereotest). Follow-up comprehensive eye examination of screening-positive children included manual cycloplegic retinoscopy. RESULTS: Testability was high for both methods. Orthoptic screening identified 36 children with reduced vision and/or factors associated with amblyopia (referral rate 12.5%). The PVS identified 16 children with potential vision problems (referral rate 5.6%), indicating only moderate sensitivity (44%; 95% CI 27.9 to 61.9%), but high specificity (100%; 95% CI 98.5 to 100%) to detect factors associated with amblyopia. The PVS underestimated visually significant refractive errors. CONCLUSIONS: Use of the PVS as single screening test in young children may miss a significant number of children with amblyopia or amblyogenic risk factors.
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