The Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia, USA.
Ophthalmology. 2012 Oct;119(10):2009-13. doi: 10.1016/j.ophtha.2012.05.019. Epub 2012 Jul 13.
To design a simple matching acuity test based on hand gestures that is minimally dependent on familiarity with symbols and letters. The visual acuity results obtained from children using the Handy Eye Chart were compared with results obtained with the Early Treatment Diabetic Retinopathy Study (ETDRS) chart.
Evaluation of diagnostic test or technology.
Sixty children aged 6 to 16 years were recruited consecutively from the Pediatric Ophthalmology section of the Emory Eye Center.
Monocular visual acuity was tested using both the new eye chart and the ETDRS chart, alternating the order of administration between subjects. Testing was performed on the subject's eye with the poorest acuity.
Outcome measures were monocular logarithm of the minimum angle of resolution (logMAR) visual acuity scores for each chart.
The acuities were shown to have a strong linear correlation (r = 0.95) and a mean difference in acuity of -0.03 (95% confidence interval, -0.05 to -0.01) logMAR, equivalent to approximately 1.5 letters, with the new eye chart underestimating the vision as determined by the ETDRS chart. The 95% limits of agreement were ±1.6 lines.
This study supports the validity of the new eye chart as a measure of visual acuity in pediatric patients aged 6 to 18 years with vision ranging from 20/16 to 20/200.
设计一种基于手势的简单匹配视力测试方法，该方法对手势和字母的熟悉程度的依赖最小。使用 Handy Eye Chart 获得的儿童视力结果与早期糖尿病视网膜病变研究（ETDRS）图表的结果进行比较。
诊断测试或技术的评估。
连续从埃默里眼科中心小儿眼科部分招募了 60 名年龄在 6 至 16 岁的儿童。
使用新图表和 ETDRS 图表对单眼视力进行测试，在受试者之间交替进行测试顺序。在视力最差的眼睛上进行测试。
结果是每个图表的单眼最小角分辨率（logMAR）视力得分的对数。
视力结果显示出很强的线性相关性（r = 0.95），新图表的视力平均差异为-0.03（95%置信区间，-0.05 至-0.01）logMAR，相当于大约 1.5 个字母，新图表低估了 ETDRS 图表确定的视力。95%一致性界限为±1.6 行。
这项研究支持新图表作为 6 至 18 岁儿童视力在 20/16 至 20/200 范围内的视力测量的有效性。
