| Objective:It is undoubtedly correct way to prevent and control youth myopia through sports activities.Previous studies on preventing and controlling myopia through sports activities mainly focus on sports time,sports items,frequency of visual intervention and etc,which have verified the effectiveness of sports activities on preventing and controlling myopia.However,no research paid attention to the difference between dominant and non-dominant eyes.In the visual activities of two eyes,the dominant eye is mainly used to recognize the distance of objects and make images clearer while the non-dominant eye is in a weak state and is used to identify the background around target objects.The KVA-led vision intervention program,which is currently used to prevent and control myopia through sports activities,unconsciously selects the training methods that are conducive to improving the visual condition of dominant eyes.Therefore it is unclear whether there is an equivalent effect in people with poor naked eye distance vision in non-dominant eyes.Differences in eyes may lead to differences in the effectiveness of sports activities in improving vision.In order to investigate the effects of different vision intervention training sports activity programs on the naked eye distance vision and dynamic vision of dominant and non-dominant eyes,this study,based on content of physical education in primary school,explores,develops and designs sports activity programs to prevent and control myopia for non-dominant eyes.By doing so,it is hoped that this current study can to some degree provide scientific research support for the prevention and control of children’s myopia.Methods:(1)Documentation;(2)Mathematical statistics;(3)Experimentation.Four parallel intact classes in a primary school in Suzhou participated in this study with two classes as a group.Class 1 and Class 2 were chosen as the KVA-led group while Class 3 and Class 4 as the DVA-led group.The intervention experiment on the two groups lasted for 15 weeks.A pre-test and post-test on students’ naked eye distant vision and dynamic vision were conducted.Through analysis,the influence of different training programs on students’ naked eye distant vision and dynamic vision of dominant and non-dominant eyes was discussed,and conclusions were drawn.Results:(1)Dominant eyes are more prevalent in the right eye and there was no significant difference in the degree of myopia between dominant and non-dominant eyes(p>0.05).(2)In both the KVA-led intervention group and the DVA-led intervention group,the naked-eye distance vision in dominant eyes,the naked-eye distance vision in non-dominant eyes and the dynamic vision were significantly improved(p<0.05).(3)The KVA-led intervention program can improve naked-eye distance vision in the dominant eyes of students with emmetropia and poor vision(p<0.05).Students with emmetropia in their non-dominant eyes improved their naked-eye distance vision significantly(p<0.05)while students with poor visual acuity in their non-dominant eyes did not improve their naked-eye distance vision significantly(p>0.05).The DVA-led intervention program can also improve naked-eye distance vision in the dominant eyes of students with emmetropia and poor vision(p<0.05).The naked-eye distance vision in dominant eyes of students with emmetropia and severe visual impairment were significantly improved(p<0.05).There was no significant difference in the naked-eye distance vision of dominant eyes of students with mild or moderate visual impairment(p>0.05).There was no significant difference in the naked-eye distance vision between the dominant and non-dominant eyes at different levels of vision in both the KVA-led intervention group and the DVA-led intervention group(p>0.05).(4)Students’visual acuity levels were significantly improved in both males and females in the KVA-led intervention group and the DVA-led intervention group(p<0.05)except that there was no significant difference in non-dominant naked-eye distance vision in males in the KVA-led intervention group(p>0.05).After the experiment,there was no significant difference in the naked-eye distance vision and dynamic visual acuity of the dominant eye and the non-dominant eye of males and females(p>0.05).(5)In the KVA-led intervention group,the naked-eye distance vision and dynamic vision of students with poor naked-eye distance vision in their dominant eyes were significantly higher than those with poor naked-eye distance vision in their non-dominant eyes(p<0.05).In the DVA-led intervention group,there was no significant difference in the naked-eye distance vision between students with poor naked-eye distance vision in their dominant eyes than those with poor distance vision in their non-dominant eyes(p>0.05)and the dynamic vision was significantly higher in students with poor distance vision in their non-dominant eyes than those with poor distance vision in their dominant eyes(p<0.05).(6)In the KVA intervention program,compared with that in the pre-test,students’naked distant eye vision in their dominant eyes with poor naked-eye distance vision was significantly improved in the post-test(p<0.05)while there was no significant difference between the post-test and the pre-test in students with poor naked eye distant vision in non-dominant eyes(p>0.05).In the DVA intervention program,compared with the pre-test,students’ naked-eye distance vision in their dominant eyes and the non-dominant eyes with poor naked-eye distance vision was significantly improved in the post-test(p<0.05).After the experiment,compared with the improvement of DVA intervention program,there was no significant difference in the improvement of KVA intervention for naked-eye distance vision in students with poor naked eye distance vision in their dominant eyes(p>0.05).There was no significant difference in the improvement of KVA intervention for naked-eye distance vision in students with non-dominant naked eye distance vision and poor visual acuity compared with DVA intervention program(p>0.05).(7)The dynamic vision was significantly improved in both the KVA-led intervention group and the DVA-led intervention group in students with poor distance vision in the dominant and non-dominant eyes(p<0.05).Conclusions:(1)KVA-led intervention in PE teaching and DVA-led intervention in PE teaching have positive effects on naked eye distant vision and dynamic vision of fourth grade students.(2)The KVA-led physical education can improve the vision of students with emmetropia and poor vision in their dominant eyes as well as the naked-eye distance vision of students with emmetropia in their non-dominant eyes.The DVA-led physical education can improve the naked-eye distance vision of students with emmetropia and poor vision in their non-dominant eyes as well as the naked-eye distance vision of students with emmetropia and severe poor vision in their non-dominant eyes.(3)In the KVA-led intervention group,male students’ naked distant vision and dynamic vision in dominant eyes were improved,while female students’ naked distant vision and dynamic vision in dominant eyes and non-dominant eyes were improved;In DVA-led intervention group,male and female students’ distant vision and dynamic vision in dominant and non-dominant eyes were improved.There was no difference in improvement between the two groups.(4)the two programs had different emphases.The KVA led intervention program was beneficial to the dominant naked eye distance vision of students with poor naked-eye distance vision while the DVA-led intervention program to the non-dominant naked eye distance vision of students with poor naked-eye distance vision.(5)The positive effects of improved dynamic vision have not yet affected the naked-eye distance vision. |
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