The roles of orthokeratology with a small treatment zone and peripheral defo-cus spectacle lenses in the prevention and control of myopia in children
10.13389/j.cnki.rao.2025.0022
- VernacularTitle:小治疗区角膜塑形镜与离焦框架眼镜在儿童近视防控中的作用
- Author:
Yuanyuan WANG
1
;
Jing DONG
;
Wei ZHANG
;
Yuelan FENG
Author Information
1. 014040 内蒙古自治区包头市,内蒙古科技大学包头医学院
- Publication Type:Journal Article
- Keywords:
myopia;
peripheral defocus spectacle lenses;
small treatment zone;
orthokeratology lenses;
axial length
- From:
Recent Advances in Ophthalmology
2025;45(2):120-124
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study and compare the myopia control effects of orthokeratology(OK)lenses with a small treatment zone and peripheral defocus spectacle lenses in children aged 8-12 years.Methods A prospective study was made on 120 myopic children(120 myopic eyes were all right eyes)aged 8-12 years who visited the Optometry Clinic of the First Affiliated Hospital of Baotou Medical College between September 2022 and April 2023.The patients were randomly divided into a single vision lens(SVL)group,a highly aspherical lenslets(HAL)group,a 6.2 mm-BOZD OK group and a 5.0 mm-BOZD OK group,with 30 cases(30 eyes)in each group.After 12 months of follow-up,the spherical equivalent(SE),axial length(AL),cylinder diopter and their variations were compared among the four groups at different time points before and after treatment.Results There were no significant differences in SE and AL among the four groups be-fore and 3 months after treatment(all P＞0.05).After 6 months of treatment,there were no statistically significant differ-ences in SE among the four groups(P＞0.05),but significant differences were observed in AL among the four groups(P＜0.05).Pairwise comparisons revealed that the AL in the 5.0 mm-BOZD OK group was significantly lower than that in the SVL group(P＜0.05).There was no significant difference between each two of the other groups(all P＞0.05).After 12 months of treatment,significant differences in SE and AL were observed among the four groups(all P＜0.05).Pairwise comparisons revealed that compared with the SVL group,the HAL,6.2 mm-BOZD OK,and 5.0 mm-BOZD OK groups ex-hibited a statistically significant increase in SE and decrease in AL(all P＜0.05).However,there was no significant differ-ence in SE and AL among HAL,6.2 mm-BOZD OK,and 5.0 mm-BOZD OK groups(all P＞0.05).After 12 months of treat-ment,there were significant differences in the changes of SE and AL among the four groups(all P＜0.05).The changes of SE and AL in HAL,6.2 mm-BOZD OK,and 5.0 mm-BOZD OK groups were significantly less than those in the SVL group(all P＜0.05).The changes of SE and AL in the 5.0 mm-BOZD OK group were significantly less than those in HAL and 6.2 mm-BOZD OK groups(all P＜0.05).There was no significant difference in the changes of SE and AL between HAL and 6.2 mm-BOZD OK groups(both P＞0.05).There were no significant differences in cylinder diopter among the four groups be-fore and 12 months after treatment.In the SVL group,there was no significant difference in cylinder diopter before and 12 months after treatment.The cylinder diopters of HAL,6.2 mm-BOZD OK and 5.0 mm-BOZD OK groups were significantly decreased 12 months after treatment,compared with those before treatment.Conclusion HAL,6.2 mm-BOZD OK len-ses and 5.0 mm-BOZD OK lenses can effectively control the progression of myopia in children aged 8-12 years.Among them,5.0 mm-BOZD OK lenses exhibit the most significant control effect,while HAL and 6.2 mm-BOZD OK lenses have similar myopia control effects.
