Kheterpal S, Jones H S, Auld R, Moseley M J
Birmingham and Midland Eye Hospital, UK.
Ophthalmic Physiol Opt. 1996 Sep;16(5):447-9.
We examined the test-retest reliability of visual acuity in 18 children referred to the Hospital Eye Service with reduced vision. Unaided distance acuities were recorded, using logarithmically scaled letter charts, on two occasions separated by an interval of one week during which no clinical intervention took place. Coefficients of repeatability were found to be +/- 0.25 and +/- 0.21 log units in left and right eyes, respectively. A further analysis of 14 subjects' data each of whom had one eye with consistently poorer acuity in both test sessions yielded coefficients of repeatability of +/- 0.15 and +/- 0.22 log units in, respectively, the better and poorer eyes. The reliability of visual acuity recorded in the better eye closely approximates to that previously found in normal adults, whilst that of the poorer eye appears more comparable to that of adult clinical populations.
我们对18名视力下降并转诊至医院眼科服务部门的儿童进行了视力重测信度研究。使用对数标度字母图表记录两次未矫正的远视力，两次测量间隔一周，在此期间未进行临床干预。结果发现，左眼和右眼的重复性系数分别为±0.25和±0.21对数单位。对另外14名受试者的数据进行进一步分析，这些受试者在两次测试中均有一只眼睛的视力始终较差，结果发现，较好眼和较差眼的重复性系数分别为±0.15和±0.22对数单位。较好眼记录的视力信度与之前在正常成年人中发现的信度相近，而较差眼的信度似乎更接近于成年临床人群的信度。
