Use of Statistical Analysis for Visual Acuity Measurement

DOI 20 References
  • Mita Norihiro
    Graduate School of Health Science and Technology, Kawasaki University of Medical Welfare
  • Hara Heihachiro
    Department of Health Informatics, Kawasaki University of Medical Welfare
  • Kani Kazutaka
    Department of Sensory Science, Kawasaki University of Medical Welfare
  • Tabuchi Akio
    Department of Sensory Science, Kawasaki University of Medical Welfare

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  • 統計解析を用いた視力測定

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<p>Purpose: In psychophysics, it is said that logarithmic (Log) visual acuity (VA) can be illustrated by normal distribution. We developed a statistical method for evaluating VA changes in an individual.</p><p>Methods and Results: LogVA and standard deviation (SD) were calculated by logistic regression. We assessed the change in VA using the χ2-test. We tested 1 individual with no visual abnormalities in order to assess the accuracy of this statistical evaluation method. LogVA was 0.368±0.021 in complete refractive correction and 0.243±0.016 in +0.50D incomplete refractive correction. We statistically evaluated the decrease in VA.</p><p>Conclusion: Heretofore, change in VA had not been assessed on a scientific basis in an individual. However, we calculated LogVA±SD by logistic regression and evaluated it using Nagai’s test of significant difference.</p>

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