Toner Keri N, Lynn Michael J, Candy T Rowan, Hutchinson Amy K
Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia.
Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia; Department of Biostatistics and Bioinformatics, Rollins School of Public Health of Emory University, Indianapolis, Indiana.
J AAPOS. 2014 Jun;18(3):258-60. doi: 10.1016/j.jaapos.2014.01.011.
To compare visual acuity results obtained with the Handy Eye Chart to results obtained using the Handy Eye Check, a mobile medical application that electronically presents isolated Handy Eye Chart optotypes according the Amblyopia Treatment Study (ATS) protocol.
Consecutive patients 6-18 years of age presenting for eye examinations between May 30, 2012, and June 26, 2012, were invited to participate. Monocular visual acuity testing was performed on the subject's poorer-seeing eye using both the Handy Eye Check and the Handy Eye Chart under the same conditions. Visual acuity was first tested using the mobile application, then using the chart, followed by repeated application testing. Patients were excluded if they were unable to undergo the required visual acuity testing or if visual acuity in the worse-seeing eye was less than 20/200 (for validity testing, but not reliability testing).
There was a strong linear correlation (r = 0.92) and a mean difference in acuity of -0.005 logMAR, or less than one letter (95% CI, -0.03 to 0.02), between the two tests. The 95% limits of agreement were ± 2 lines. Test-retest reliability was high, with 81% of retest scores within 0.1 logMAR (5 letters) and 100% within 0.2 logMAR (10 letters), an intraclass correlation coefficient of 0.93, and a standard error of measurement of 0.08.
The Handy Eye Check mobile application compares similarly to the Handy Eye Chart as a valid and reliable test of visual acuity in children age 6-18 years.
比较使用便捷视力表获得的视力结果与使用便捷视力检查（一款移动医疗应用程序，可根据弱视治疗研究[ATS]方案以电子方式呈现单独的便捷视力表视标）获得的结果。
邀请了在2012年5月30日至2012年6月26日期间前来进行眼科检查的6至18岁连续患者参与。在相同条件下，使用便捷视力检查和便捷视力表对受试者视力较差的眼睛进行单眼视力测试。首先使用移动应用程序进行视力测试，然后使用视力表，接着再次进行应用程序测试。如果患者无法进行所需的视力测试，或者视力较差的眼睛的视力低于20/200（用于有效性测试，但不用于可靠性测试），则将其排除。
两次测试之间存在强线性相关性（r = 0.92），视力平均差异为-0.005 logMAR，或小于一个字母（95%可信区间，-0.03至0.02）。95%的一致性界限为±2行。重测信度较高，81%的重测分数在0.1 logMAR（5个字母）以内，100%在0.2 logMAR（10个字母）以内，组内相关系数为0.93，测量标准误为0.08。
便捷视力检查移动应用程序作为6至18岁儿童视力的有效且可靠测试，与便捷视力表的比较结果相似。
