一款用于测试近视力的智能手机应用程序的有效性。
Effectiveness of a smartphone application for testing near visual acuity.
作者信息
Tofigh S, Shortridge E, Elkeeb A, Godley B F
机构信息
Department of Ophthalmology and Visual Sciences, University of Texas Medical Branch, Galveston, TX, USA.
出版信息
Eye (Lond). 2015 Nov;29(11):1464-8. doi: 10.1038/eye.2015.138. Epub 2015 Jul 24.
PURPOSE
The purpose of this study was to evaluate the discrepancy between the near visual acuity (VA) measurements using the EyeHandBook smartphone application and the conventional method of using the near vision card.
METHODS
Using similar environmental/examinational conditions, near VA measurements were obtained and compared using the near vision card and the EyeHandBook app for IPhone 5 from 100 subjects. The obtained data were changed to LogMAR format and the relationship between the two techniques was analyzed by paired sample t-test and scatterplot.
RESULTS
With a P-value of<0.0001, our results indicate that the EyeHandBook application running on IPhone 5 overestimates the near VA compared with the conventional near vision card by an average of 0.11 LogMAR unless the measurement done by the near vision card was 20/20.
CONCLUSIONS
Owing to vast utilization of portable high-definition screens in VA measurements, eye-care providers have to be mindful of the potential disparity in VA measurement between different platforms, which in our study was likely secondary to the high contrast and brightness levels of the smartphone's high-definition screen when compared with the near vision card.
目的
本研究旨在评估使用EyeHandBook智能手机应用程序测量近视力（VA）与使用近视力卡片的传统方法之间的差异。
方法
在相似的环境/检查条件下，对100名受试者使用近视力卡片和适用于iPhone 5的EyeHandBook应用程序进行近视力测量并比较。将获得的数据转换为LogMAR格式，并通过配对样本t检验和散点图分析两种技术之间的关系。
结果
P值<0.0001，我们的结果表明，在iPhone 5上运行的EyeHandBook应用程序与传统近视力卡片相比，平均高估近视力0.11 LogMAR，除非近视力卡片测量结果为20/20。
结论
由于便携式高清屏幕在视力测量中的广泛使用，眼科护理人员必须注意不同平台之间视力测量的潜在差异，在我们的研究中，这可能是由于智能手机高清屏幕与近视力卡片相比具有高对比度和亮度水平所致。
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