目的: 探讨 ETDRS 对数视力表对儿童视力检查的可重复性及其影响的相关因素。

方法: 在流行病学调查的过程中, 随机使用 ETDRS 对数视力表, 为 250 位裸眼视力低于 0.5 和 98 位视力正常儿童进行裸眼视力重复检查。
结果: 两次视力测量之间差异的均数为0.004log^±0.07; Kappa 分析结果具有很好的一致性(k = 0.71) ; 性别与视力检查一致性无明显相关(P = 0.845) ; 年龄与视力检查一致性有显著相关性(P = 0.019) , 年龄越小视力检查一致性越差; 屈光不正与视力检查一致性也有显著相关性(P = 0.000) , 近视度数在- 1.00D～- 5.00D 之间的儿童视力检查一致性相对差, 而正视眼的视力检查一致性较好。

结论: 结果提示 ETDRS 对数视力表适合儿童视力检查, 建议推广使用。

Purpose: To evaluate repeatability of the ETDRS log MAR visual acuity measurementin children and the relative influence factors.

Methods: The children (n = 348) with visual acuity less than 0.5 ( equal to 0.3 logunit) in either eye,or one tenth in children with normal visual acuity were chosen todo repeatable uncorrected VA measurement with Bland-Altman analysis and Kappa analysis using ETDRS acuity chart.

Results: The mean difference of visual acuity was 0.004log^±0.07. There was a significant repeatability (k = 0.71) between two visual acuity examination. There were significant consistent results both on male and female patients (P = 0.845) . A significant relationship was found between age and VA repeatability(P = 0.019) . The VA repeatability could also be influenced by refractive error (P = 0.000) . The acuity measurement in children with emmetropia (k = 0.82) had a higher repeatability than in the children with myopia (k = 0.66) .

Conclusions: The ETDRS visual acuity chart can provide a repeatable measure of visual acuity in children. It is recommended for clinic examination of children.