Arippol Patrícia Katayama Kjaer, Salomão Solange Rios, Belfort Rubens
Universidade Federal de São Paulo, São Paulo, SP, Brasil.
Arq Bras Oftalmol. 2006 Nov-Dec;69(6):907-14. doi: 10.1590/s0004-27492006000600021.
To elaborate and to validate a computerized test for visual acuity screening of school-age children.
We have created a computerized test for visual acuity assessment with optotypes arranged as those of printed logarithmic charts used in ophthalmic clinic. Ninety seven-year-old students, 8 normal adult volunteers and 10 patients from the Strabismus sector of the Federal University of São Paulo were evaluated by the same examiner and submitted to the visual acuity test through printed visual acuity logarithmic tumble "E" chart and the new computerized test at the same time. Written consent was obtained after clarification about the research project.
Statistical analysis showed excellent correlation between the two methods (r>0.75) besides the slight trend of the computerized test to overestimate visual acuity when compared with the gold standard. Sensitivity of the computerized test was 100% (correctly identified 6 eyes with poor visual acuity) and specificity was 94%.
The computerized test can be used as a new clinical tool for visual acuity screening of school-age children and it is fast, easy to perform and inexpensive, besides being more attractive for children. The method releases the examiner from the interpretation of the subject's answers and ensures the procedure's standardization even when more than one examiner performs the test. To better understand the effectiveness of this method for visual screening, one option would be to introduce it in elementary schools, after training the teachers to perform this test.
精心设计并验证一种用于学龄儿童视力筛查的计算机化测试。
我们创建了一种用于视力评估的计算机化测试，其中视标排列方式与眼科诊所使用的印刷对数视力表相同。由同一位检查者对9名7岁学生、8名正常成年志愿者以及圣保罗联邦大学斜视科的10名患者进行评估，并让他们同时通过印刷视力对数翻牌“E”视力表和新的计算机化测试进行视力测试。在对研究项目进行说明后获得了书面同意。
统计分析表明，两种方法之间具有极佳的相关性（r>0.75），此外，与金标准相比，计算机化测试有轻微高估视力的趋势。计算机化测试的敏感度为100%（正确识别出6只视力不佳的眼睛），特异度为94%。
计算机化测试可作为学龄儿童视力筛查的一种新的临床工具，它快速、易于实施且成本低廉，此外对儿童更具吸引力。该方法使检查者无需对受试者的答案进行解读，即使有多名检查者进行测试，也能确保程序的标准化。为了更好地理解这种视力筛查方法的有效性，一种选择是在对教师进行培训使其能够进行此项测试后，将其引入小学。
