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用字母匹配方法对南宁市１１７１名集体儿童单位做视力筛查。１１７１例学龄前儿童经筛查后视力筛查异常发生率为４．７％。某幼儿园中２２例视力筛查异常经眼科复检，４例视力正常，字母匹配方法筛查率为８２％。１８例眼科复检视力异常中，１３例行散瞳后客观屈光检影均为异常。以客观屈光检影为确诊标准，视力异常发生串为４．４％（１３／２９８）。
A letter screening method was used to screen 1171 collective children’s units in Nanning City. 1171 cases of pre-school children after screening visual acuity abnormalities was 4.7%. A kindergarten in 22 cases of vision screening abnormalities by the ophthalmology re-examination, 4 cases of normal vision, letter matching method screening rate was 82%. 18 cases of ophthalmological examination of visual acuity abnormalities, 13 cases of mydriasis after the objective refractive retinoscopy are abnormal. To objective refractive retinoscopy as the diagnostic criteria, visual acuity occurred string was 4.4% (13/298).