Objective To investigate visual acuity and refractive status of junior school students in Longgang District of Shenzhen city,provide scientific basis for prevention and control of myopia.Methods A total of 1 925 students were selected from three junior schools in Longgang District of Shenzhen city from January to December in 2015 by cluster sampling method,then a questionnaire survey was performed.Visual acuity,anterior segment,fundus,eye position,and refractive status were examined in all the students.The risk factors of poor visual acuity were analyzed.The refractive statuses of these students of different grades and genders were compared.Results The detection rate of poor vision was 70.5％ among 1 925 junior school students in Longgang District of Shenzhen city.Female,family history of high myopia,using eyes for a long time and at close range were the main risk factors.The detection rates of emmetropia,hyperopia,and astigmatism decreased gradually with the increase of grade,there were statistically significant differences in the detection rates of emmetropia and hyperopia among the students in different grades (x2 =22.153,P＜0.05;x2 =7.601,P＜0.05).The detection rates of mild,moderate,and high myopia increased gradually with the increase of grade,there were statistically significant differences in the detection rates of mild and high myopia among the students in different grades (x2 =8.508,P＜0.05;x2 =27.934,P＜0.05).Conclusion The detection rate of poor vision is high among the junior school students in Longgang District of Shenzhen city.Prevention and treatment of myopia is of great importance in controlling poor vision among junior school students.

目的 了解深圳市小学生视力及屈光状态,为近视防控提供科学依据.方法 整群抽取深圳市内5所不同小学共6737名在校学生,进行视力、前房、眼底、眼位和屈光状态检查.结果 深圳市6737名学龄期小学生视力不良检出率66.0％,其中女性、高度近视家族史,连续看近情况,户外活动情况为小学生视力不良的危险因素.随着年龄增长,正视、远视、散光的检出率逐渐减小,且有统计学意义(P＜0.05),轻度近视、中度近视、高度近视的检出率逐渐增多,且有统计学意义(P＜0.05).结论 深圳市小学生视力不良检出率高,近视是主要原因,做好近视防治工作,对控制小学生视力不良有重要意义.

AIM:To retrospectively analyze the myopia progression in children after oral delivery of Difrarel for 6mo. METHODS:Collecting myopic children aged 3～13 in our hospital from June 2012 to January 2015, 36 cases(69 eyes)included, 16 males(30 eyes)and 20 females(39 eyes). After dilated by atropine eye ointment, all cases were divided into three groups according to the spherical equivalent degree. There were 30 eyes in high myopia group(>-6.00D),24 eyes in moderate myopia group(-3.00～-6.00D)and 15 eyes in mild myopia group(RESULTS:The spherical equivalent degree, AL and AL/CR increased in mild and moderate myopia group after oral delivery of Difrarel for 6mo, but had found statistically significant differences in moderate myopia group only(P<0.05). The spherical equivalent degree and AL increased in high myopia group also, but no change in AL/CR, and all had no significant differences in high myopia group(P>0.05). The spherical equivalent degree, AL and AL/CR increased in preschool children group and juvenile group,but only AL and AL/CR had found statistically significant differences in preschool children group(P<0.05). CONCLUSION:Short-term oral delivery of Difrarel in children can control the progression of mild and high myopia, but have no effect on moderate myopia; and short-term oral delivery of Difrarel in children can control the progression of juvenile myopia, but have no effect on preschool myopia.