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目的比较LeaSymbols视力表与TumblingE视力表在学龄前儿童中视力的检测率、视力值和双眼间视力差异。方法对温州市某幼儿园一小班24名36～50(平均43.2±3.71)个月的儿童以随机顺序先后用LeaSymbols与TumblingE视力表检查单眼视力,视力值用logMAR记录方法来表示,用logMAR单位记录双眼视力差异。结果Leasymbols视力表的检测率为96%,Tum-blingE视力表的检测率为71%,其中33只眼能配合查Leasymbols与TumblingE,TumblingE的视力为0.26±0.10,Leasymbols的视力为0.19±0.10,两者呈线形相关(相关系数r=0.76),两者作配对t检验有显著性差异(t=6.068,p<0.0001),16名儿童用LeaSymbols测得的双眼视力差别为-0.004±0.065,用TumblingE测得的双眼视力差别为-0.019±0.067,两者呈线形相关(相关系数r=0.65),统计学分析两者无显著性差异(p=0.296)。结论Leasymbols视力表检查学龄前儿童视力特别是3～4周岁的儿童检测率高,LeaSymbols与TumblingE视力表一样能够很好地反映双眼间视力的差别,但与TumblingE视力表相比,LeaSymbols视力表存在过高估计视力的可能。视力的测定是个心理物理学过程,对于学龄前儿童,我们不能简单地根据视力小于0.8判断其弱视,而是要从儿童的认知水平来考虑。
Objective To compare the visual acuity detection rate, visual acuity, and visual acuity difference between preschool children and LeaSymbols visual acuity chart and TumblingE acuity chart. Methods Twenty-four children aged 36-50 (average 43.2 ± 3.71) months in a small class in Wenzhou City were examined monocular visual acuity using LeaSymbols and TumblingE eye chart in random order. The visual acuity was recorded by logMAR recording and recorded by logMAR unit Differences in binocular vision. Results The detection rate of Leasymbols eye chart was 96% and that of Tum-blingE eye chart was 71%. Twenty-one eyes were matched with Leasymbols and TumblingE, TumblingE had a visual acuity of 0.26 ± 0.10, Leasymbols had a visual acuity of 0.19 ± 0.10, There was a linear correlation between the two (r = 0.76), paired t-test showed significant difference (t = 6.068, p <0.0001), 16 children with LeaSymbols measured binocular visual acuity difference of -0.004 ± 0.065, The difference in binocular visual acuity measured by Tumbling E was -0.019 ± 0.067, with a linear correlation between the two (r = 0.65). There was no statistically significant difference between the two (p = 0.296). Conclusion Leasymbols eye chart examination preschool children visual acuity especially in children 3 to 4 years old detection rate, LeaSymbols and TumblingE eye chart can well reflect the difference between eyesight, but compared with the TumblingE eye chart, LeaSymbols eye chart exists Overestimated the possibility of vision. Visual acuity determination is a psychophysical process, for preschool children, we can not simply judge their amblyopia based on visual acuity less than 0.8, but from the children’s cognitive level to consider.