Moke P S, Turpin A H, Beck R W, Holmes J M, Repka M X, Birch E E, Hertle R W, Kraker R T, Miller J M, Johnson C A
Jaeb Center for Health Research, 3010 East 138th Ave., Suite 9, Tampa, Florida 33613, USA.
Am J Ophthalmol. 2001 Dec;132(6):903-9. doi: 10.1016/s0002-9394(01)01256-9.
To report a computerized method for determining visual acuity in children using the Amblyopia Treatment Study visual acuity testing protocol.
A computerized visual acuity tester was developed that uses a programmed handheld device that uses the Palm operating system (Palm, Inc, Santa Clara, California). The handheld device communicates with a personal computer running a Linux operating system and 17-inch monitor. At a test distance of 3 m, single letters can be displayed from 20/800 to 20/12. A C program on the handheld device runs the Amblyopia Treatment Study visual acuity testing protocol. Using this method, visual acuity was tested in both the right and left eyes, and then the testing was repeated in 156 children age 3 to 7 years at four clinical sites.
Test-retest reliability was high (r =.92 and 0.95 for and right and left eyes, respectively), with 88% of right eye retests and 94% of left eye retests within 0.1 logarithm of minimal angle of resolution (logMAR) units of the initial test. The 95% confidence interval for an acuity score was calculated to be the score +/- 0.13 logMAR units. For a change between two acuity scores, the 95% confidence interval was the difference +/- 0.19 logMAR units.
We have developed a computerized method for measurement of visual acuity. Automation of the Amblyopia Treatment Study visual acuity testing protocol is an effective method of testing visual acuity in children 3 to 7 years of age.
报告一种使用弱视治疗研究视力测试方案来测定儿童视力的计算机化方法。
开发了一种计算机化视力测试仪，它使用一个采用Palm操作系统（Palm公司，加利福尼亚州圣克拉拉）的编程手持设备。该手持设备与一台运行Linux操作系统和配备17英寸显示器的个人计算机进行通信。在3米的测试距离下，可显示从20/800到20/12的单个字母。手持设备上的一个C程序运行弱视治疗研究视力测试方案。使用这种方法，对156名3至7岁儿童的右眼和左眼进行了视力测试，然后在四个临床地点重复进行测试。
重测信度很高（右眼和左眼的r分别为0.92和0.95），右眼重测中有88%以及左眼重测中有94%在初始测试的最小分辨角对数（logMAR）单位的0.1范围内。计算得出视力得分的95%置信区间为得分±0.13 logMAR单位。对于两个视力得分之间的变化，95%置信区间为差值±0.19 logMAR单位。
我们开发了一种计算机化的视力测量方法。弱视治疗研究视力测试方案的自动化是测试3至7岁儿童视力的有效方法。
