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Abstract

Most vision screening protocols worldwide rely on the measurement of visual acuities (VAs) to detect visual anomalies amongst children of school-going age. This is despite the fundamental design flaws in the Snellen chart. However, there appears to be a growing demand for the usage of modern technology in the eyecare profession. The aim of this prospective and quantitative study was to evaluate the equivalence of a standard Snellen chart compared to the Spectrum Eyecare Software LogMAR chart in evaluating VAs amongst children of school going age. Normative data was collected from three randomly selected schools in Johannesburg (South Africa) on the non-clinical population of 209 children of school-going age mean 10.13卤2.45 years. Monocular and binocular VAs was measured using the Snellen chart at six meters and the spectrum computer software program at three meters. The statistical significant differences (p<0.05) were determined using ANOVA for distance binocular and monocular VAs using the Snellen chart and the Spectrum Eyecare Software. The performance of the Spectrum Software LogMAR was found to be one line better than that of the Snellen chart. However, the Snellen chart still remains the simple, easily accessible and inexpensive method to be used for vision screening amongst children of school-going age compared to the Spectrum Eyecare Software. Recent Publications: 1. Perera C, Chakrabarti R, Islam F M A and Crowston J (2015) The eye phone studies: reliability and accuracy of assessing Snellen visual acuity using smartphone technology. Eye (London, England) 29 (7): 888-894. 2. Lodha V S (2015) Comparison of visual acuity measurement by smartphone based application vs. conventional Snellen visual acuity chart. International Journal of Enhanced Research in Medicines and Dental Care 2(6): 39-41. 3. Gounder P A, Cole E, Colley S, Hille D M (2014) Validation of a portable electronic visual acuity system. Journal of Manufacturing Technology Management 3 (2): 35-39. 4. Zhang Z T, Zhang S C, Huang X G, et al. (2013) A pilot trial of the iPad tablet computer as a portable device for visual acuity testing. Journal of Telemedicine and Telecare 19 (1): 55-59. 5. Trivedi R H, Wilson M E, Peterseim M M, Cole K B and Teed R G W (2010) A pilot study evaluating the use of EyeSpy video game software to perform vision screening in school-aged children. Journal of AAPOS 14.

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