The purpose was to determine the validity of the OPTEC 5500 vision screener in detecting visual acuity and amblyopia in paediatric patients aged 3-17 years with comparison to the Lea and Snellen tests. This was a cross-section study of 64 patients. In the age group of <7 years, OPTEC had a sensitivity of 75% and 72.2% for right and left eyes; specificity of 100% and 78.6%; positive predictive value of 100% and 81.3%; negative predictive value of 57.1% and 68.8%; and accuracy of 81.3% and 75% for right and left eyes. At ages >8 years, sensitivity was 79.3% and 87.5%; specificity of 100% and 100%; positive predictive values of 100% and 100%; negative predictive values of 40% and 75%; and accuracy of 81.8% and 90.9% for right and left eyes. Overall for all ages, sensitivity was 77.4% and 81%; specificity of 100% and 87%; positive predictive values of 100% and 91.9%; negative predictive values of 50% and 71.4%; and accuracy of 81.5% and 83.1% for right and left eyes. The authors conclude that OPTEC had a below average sensitivity compared to other screening devices but a high specificity in all ages. They advise further studies to assess the device in general paediatric populations and to explore other options for paediatric vision screening devices.
Screening for amblyopia
Reviewed by Fiona Rowe
Assessment of an advanced vision screen in the detection of amblyopia in the Nebraska pediatric population.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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