Preliminary report: Examination of young children with Lea symbols
Preliminary report: Examination of young children with Lea symbols
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DOI：
10.1076/0927-3972(200009)831-zft209
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发表时间：
2000-01
期刊：
影响因子：
0.9
通讯作者：
R. Becker;S. Hübsch;M. Gräf;H. Kaufmann
中科院分区：
文献类型：
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作者：
R. Becker;S. Hübsch;M. Gräf;H. Kaufmann
背景莱亚符号对合作患者的弱视检测具有高度敏感性。它们有利于儿童视力的评估。因此，我们评估了年龄相关的正常值和莱亚符号视力的眼间差异。方法/患者。我们重新检查了193名21个月至7岁的儿童中的50名，他们在1999年1月至11月期间进行了常规儿科检查。测量莱亚符号视敏度（莱亚Symbols Single Symbol Book（LS）和莱亚15-Line Folding Distance Chart（CLS））和Landolt-C视敏度（单视敏度（LC）和2.6'眼型间距拥挤视敏度（LC 2.6））。使用了四分之三的标准。斜视和任何器质性眼部疾病通过正视和眼科检查排除，包括生物显微镜检查、检眼镜检查、视网膜检影检查或屈光测定、遮盖试验或Hirschberg试验和Lang立体试验。结果只有26%的父母（193人中的50人）接受了我院的检查。在50名儿童中，35（32）名儿童可以用单个（拥挤）莱亚符号分别在双眼中测量视力，而26（25）名儿童可以用Landolt-C单（拥挤）视力表在双眼中进行单眼检查。除一名3岁男孩外，所有30个月以上的儿童都可以用单个莱亚符号进行测试。莱亚的视力优于兰多尔特视力。单视标和拥挤视标的差异约为1.5行（1.5 dB）。在63%（69%）的儿童谁可以测试单眼，LS敏锐度（CLS敏锐度）高于0.8（0.63）。89%（83%）的儿童对单个（拥挤）莱亚符号的眼间差异最大为1行。结论.最小的孩子的视力可以评估与莱亚符号是23个月大。几乎每个30个月以上的孩子都可以用莱亚符号进行测试。莱亚视力高于1和眼间差异小于2行是不怀疑弱视。差异超过一行的儿童应重新检查。
BACKGROUND. Lea symbols are highly sensitive for detection of amblyopia in cooperative patients. They are favorable for visual acuity assessment in childhood. Therefore, we assessed age-related normal values and interocular differences of Lea symbol visual acuity. METHODS/PATIENTS. We reexamined 50 out of 193 children aged 21 months to 7 years who came for a routine pediatric examination between January and November 1999. Lea symbol acuity (Lea Symbols Single Symbol Book (LS) and Lea 15-Line Folding Distance Chart (CLS)) and Landolt-C acuity (single (LC) and crowded with 2.6' inter-optotype distance (LC 2.6 )) were measured. A three out of four criterion was used. Strabismus and any organic eye disease were excluded by orthoptic and ophthalmologic examination, consisting of biomicroscopy, ophthalmoscopy, retinoscopy or refractometry, cover test or Hirschberg test and Lang Stereotest. RESULTS. Only 26% of the parents (50 out of 193) accepted an examination in our hospital. In 35 (32) of the 50 children, visual acuity could be measured in both eyes seperately with single (crowded) Lea symbols, while 26 (25) children could be examined in both eyes monocularly with the Landolt-C with single (crowded) optotypes. Except for one 3-year-old boy, all of the children older than 30 months could be tested with single Lea symbols. Lea acuity surpassed Landolt acuity. The difference was about 1.5 lines (1.5 dB) for both the single and the crowded optotypes. In 63% (69%) of the children who could be tested monocularly, LS acuity (CLS acuity) was higher than 0.8 (0.63). 89% (83%) of the children had an interocular difference of maximum 1 line for single (crowded) Lea symbols. CONCLUSIONS. The youngest child whose visual acuity could be assessed with Lea symbols was 23 months old. Almost every child older than 30 months could be tested with Lea symbols. Lea acuity higher than 1 and an interocular difference less than 2 lines is not suspect for amblyopia. Children with a difference of more than one line should be reexamined.