Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study
Objective. To investigate the association between myopia progression and school entrance age among Chinese schoolchildren and to suggest a more appropriate school age. Methods. 1,463 children aged six to nine years from Wenzhou, China, were examined and followed up for two and a half consecutive yea...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Journal of Ophthalmology |
| Online Access: | http://dx.doi.org/10.1155/2021/7430576 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832559781292802048 |
|---|---|
| author | Linjie Liu Dandan Jiang Chunchun Li Yaoyao Lin Wenzhe Zhou Haishao Xiao Yanyan Chen |
| author_facet | Linjie Liu Dandan Jiang Chunchun Li Yaoyao Lin Wenzhe Zhou Haishao Xiao Yanyan Chen |
| author_sort | Linjie Liu |
| collection | DOAJ |
| description | Objective. To investigate the association between myopia progression and school entrance age among Chinese schoolchildren and to suggest a more appropriate school age. Methods. 1,463 children aged six to nine years from Wenzhou, China, were examined and followed up for two and a half consecutive years. Their noncycloplegic refraction was measured twice each year by using an automatic refractometer; axial length (AL) and corneal radius of curvature (CRC) were tested annually by using the IOLMaster for 2.5 years. The questionnaires were completed by the children to collect detailed information regarding risk factors. Here, myopia is defined as a spherical equivalent less than −1.0D. Results. The changes in spherical equivalent (SE) of 7-year-old children in grade 1 and grade 2 were −0.45D and -0.56D, while changes in AL were 0.59 mm and 0.62 mm, respectively. The SE changes of 8-year-old children in grade 2 and grade 3 were −0.54D and −0.75D; meanwhile, the AL changes were 0.57 mm and 0.61 mm, respectively. Significant statistical differences were observed in ocular biological structure parameters, except for corneal radius of curvature (CRC) or anterior chamber depth (ACD), among children with the same age in different grades during this study. The prevalence of myopia was also significantly higher in higher grades for children with same age. Conclusions. Myopia is related to children’s school entrance age. Children who start school in an earlier age are more likely to suffer from myopia, and the progression of myopia can be considerably faster. Therefore, it is recommended to enter school after the age of 7. |
| format | Article |
| id | doaj-art-a4f1ec34bef745aaa746e4a979ec2252 |
| institution | Kabale University |
| issn | 2090-004X 2090-0058 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj-art-a4f1ec34bef745aaa746e4a979ec22522025-02-03T01:29:21ZengWileyJournal of Ophthalmology2090-004X2090-00582021-01-01202110.1155/2021/74305767430576Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal StudyLinjie Liu0Dandan Jiang1Chunchun Li2Yaoyao Lin3Wenzhe Zhou4Haishao Xiao5Yanyan Chen6School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, ChinaSchool of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, ChinaObjective. To investigate the association between myopia progression and school entrance age among Chinese schoolchildren and to suggest a more appropriate school age. Methods. 1,463 children aged six to nine years from Wenzhou, China, were examined and followed up for two and a half consecutive years. Their noncycloplegic refraction was measured twice each year by using an automatic refractometer; axial length (AL) and corneal radius of curvature (CRC) were tested annually by using the IOLMaster for 2.5 years. The questionnaires were completed by the children to collect detailed information regarding risk factors. Here, myopia is defined as a spherical equivalent less than −1.0D. Results. The changes in spherical equivalent (SE) of 7-year-old children in grade 1 and grade 2 were −0.45D and -0.56D, while changes in AL were 0.59 mm and 0.62 mm, respectively. The SE changes of 8-year-old children in grade 2 and grade 3 were −0.54D and −0.75D; meanwhile, the AL changes were 0.57 mm and 0.61 mm, respectively. Significant statistical differences were observed in ocular biological structure parameters, except for corneal radius of curvature (CRC) or anterior chamber depth (ACD), among children with the same age in different grades during this study. The prevalence of myopia was also significantly higher in higher grades for children with same age. Conclusions. Myopia is related to children’s school entrance age. Children who start school in an earlier age are more likely to suffer from myopia, and the progression of myopia can be considerably faster. Therefore, it is recommended to enter school after the age of 7.http://dx.doi.org/10.1155/2021/7430576 |
| spellingShingle | Linjie Liu Dandan Jiang Chunchun Li Yaoyao Lin Wenzhe Zhou Haishao Xiao Yanyan Chen Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study Journal of Ophthalmology |
| title | Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study |
| title_full | Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study |
| title_fullStr | Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study |
| title_full_unstemmed | Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study |
| title_short | Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study |
| title_sort | relationship between myopia progression and school entrance age a 2 5 year longitudinal study |
| url | http://dx.doi.org/10.1155/2021/7430576 |
| work_keys_str_mv | AT linjieliu relationshipbetweenmyopiaprogressionandschoolentranceagea25yearlongitudinalstudy AT dandanjiang relationshipbetweenmyopiaprogressionandschoolentranceagea25yearlongitudinalstudy AT chunchunli relationshipbetweenmyopiaprogressionandschoolentranceagea25yearlongitudinalstudy AT yaoyaolin relationshipbetweenmyopiaprogressionandschoolentranceagea25yearlongitudinalstudy AT wenzhezhou relationshipbetweenmyopiaprogressionandschoolentranceagea25yearlongitudinalstudy AT haishaoxiao relationshipbetweenmyopiaprogressionandschoolentranceagea25yearlongitudinalstudy AT yanyanchen relationshipbetweenmyopiaprogressionandschoolentranceagea25yearlongitudinalstudy |