Application Of Visual Training In Mild Myopia Of School-aged Children

Objective:To observe the changes of accommodative training and refraction for accommodative myopia patients who had not yet worn glasses for 6 months and 12 months after the accommodative training,so as to evaluate the changes of the visual parameters for the visual function training and the role of visual training to reduce mild myopia in school-aged children without glasses.Methods:According to the different layers of diopter divided the patients into the experimental groupⅠand the control group,experimental groupⅡ and the control group,Ⅰ test group and control group all 16 people,equivalent spherical mirrors refractive diopter from 0.50 D to 1.125 D(equivalent ball lens = eyeglasses + 1/2 of astigmatism degree),astigmatism < 1.00 DC,Ⅱ experimental groups and control group every 25 people,equivalent spherical mirrors refractive diopter from 1.25 D to 2.50 D,astigmatism < 1.00 DC.Patients in the control group were treated with standard medical optometry and optician.Observation group of patients was not only given optometry and optician but also given accommodative training,the training in training room is 2 times a week,after operation and methods mastered,patients themselves do home-based visual training,The experimental paradigm consisted of a baseline session and two follow-up sessions at the end of the 6 months and 12 months of training.At the first session,baseline refractive state and selected accommodative functions were assessed.Measurements were repeated at the two follow-up sessions.The vision training included Hart chart at distance(6m)and near(40cm),accommodative flippers(±2.0D)at near,accommodative lag and refractive diopter.Results:1.The baseline session,at the end of the 6 months and 12 months of training experimental Ⅰ average Hart chart rate in the right eye are respectively 22.25cpm(±2.24cpm)、30.19cpm(±1.33cpm)、29.88cpm(±1.31cpm)、22.38cpm(±3.59cpm),It is significantly increased at the end of the 6 months training,F = 7.939,P = 0.00,and significantly increased at the end of the end of 12 months training F = 7.625,P = 0.00).There was no distinction in the control group,F=0.5,P=0.938.Experimental Ⅱ average Hart chart rate in the right eye are respectively22.38cpm(±2.22cpm)、30.44cpm(±1.54cpm)、29.75cpm(±1.61cpm).It is significantly increased at the end of the 6 months training,P < 0.01,and significantly increased at the end of training 12 months.P=0.00,There was no distinction in the control group,F=0.4,P=0.796..2.The experimental group Ⅰ accommodative flippers rate increased significantly by 3.438 cpm at the end of the 6 months,P = 0.0009,the flippers rate in the experimental group was 0.813 cpm higher at the end of training 12 months than that in 6 months,P = 0.605.There was no significant difference between the two groups.There was no distinction in the control group,P>0.05.The experimental group Ⅱ accommodative flippers rate increased significantly by 4.280 cpm at the end of the 6 months,P<0.01,comparing differences between groups are significant.The flippers rate in the experimental group was 0.320 cpm lower at the end of training 12 months than that in 6 months,P = 0.928.There was no distinction in the control group,P>0.05.3.The experimental group Ⅰaccommodative lag decreased significantly by(0.438 + 0.063)D at the end of the 6 months,P < 0.01,compare the differences between groups are significant.The accommodative lag in the experimental group decreased(0.156±0.077)D at the end of training 12 months,P>0.05,There was no distinction between them.After 6 months,the accommodative lag in the control group decreased(0.094±0.063)D,P > 0.05,the difference was not statistically significant.After 12 months,the accommodative lag in the control group decreased(0.0266 ±0.077)D,P < 0.01,and the difference was statistically significant.Experimental Ⅱ accommodative lag decreased significantly by(0.370± 0.50)D at the end of the 6 months,P < 0.01,The accommodative lag of the experimental group in 12 month decreased(0.190 ±0.062)D compared with 6 month,P < 0.05,indicating a significant difference between the groups.After 6 months,the accommodative lag in the control group decreased(0.050 ±0.050)D,P > 0.05,and the difference was not statistically significant.After 12 months,the accommodative lag in the control group decreased(0.250± 0.063)D,P < 0.01,and the difference was statistically significant.Experimental Ⅰ compared with experimental group twoⅡ,P > 0.05,there was no statistically significant difference.4.Experimental Ⅰ refractive diopter increased(-0.234 ± 0.104)D at the end of the 6 months,P > 0.05,there was no statistically significant difference;the refractive diopter was increased(-0.203 ±0.102)D at the end of training 12 months than that in 6 months,P >0.05,and the difference was not statistically significant.After 6 months,the growth of diopter in the control group was(-0.422 ±0.104)D,P < 0.01,and the difference was statistically significant.the refractive diopter was increased(-0.344±0.102)D at the end of training 12 months than that in 6 months,P<0.01,the difference was statistically significant.Therefore,compared with the control group,the growth rate of the diopter slowed down.Experimental Ⅱ diopter patients after 6month rose(-0.355 ± 0.083)D,P < 0.01,the difference was statistically significant;In the control group,the increase of diopter was(-0.395± 0.083)mm,P < 0.01,and the difference was statistically significant.at the end of training 12 months,the diopter in the experimental group Ⅱincreased(-0.323± 0.081)D,P < 0.01,and the difference was statistically significant.In the control group,the diopter increased(-0.415± 0.810)D,P < 0.01,and the difference was statistically significant.Therefore,compared with the control group,the growth rate of diopter did not slow down significantly.Conclusion:1.Visual training could delay the development of myopia,at the same time,it can increase the accommodative facility(AF)and reduce the accommodative lag for the school-aged children whose refractive diopter is less than-1.125 D at the end of training 6 month,but can not increase at the end of training 12 month,which could delay the development of myopia.2.For the refractive diopter from-1.25 D to-2.50 D,visual training could not delay the development of myopia,but it can increase the accommodative facility(AF)and reduce the accommodative lag after 6 months of visual training.There was no significant change in the accommodative facility at the end of training after12 months.But the accommodative lag was reduced after12 months.