通过眼轴测量监控角膜塑形镜在青少年近视防控中的作用

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Abstract Objective Through eye axis measurement，the role of orthokeratology lens in prevention and control of juvenile myopia was discussed.Methods A total of 120 cases of juvenile myopic patients who visited our hospital from May 2017 to May 2018 were selected as research objects and divided into observation group and control group according to random number table method，60 cases in each group.Patients in the observation group were wearing orthokeratology lens and monitored by ocular axis measurement，while patients in the control group were wearing conventional frame glasses.The intervention process was one year.Patients were followed up every 3 months and glasses were changed according to diopter changes.The diopter，corneal curvature，axial length，uncorrected visual acuity and intraocular pressure of the two groups of patients before and one year after intervention were compared.By recording the measured data of follow-up every 3 months，the linear correlation analysis was carried out on the relationship between ocular axis and diopter，corneal curvature，naked eye vision and intraocular pressure.Results One year after the intervention，the diopter of the patients in the observation group was lower than that in the control group，and the naked eye vision was higher than those in the control group，the axial length of the patients in the observation group was shorter than that in the control group，the differences were statistically significant（P＜0.05）.Linear correlation analysis showed that the ocular axis was positively correlated with diopter（r=0.783，P=0.002）.The ocular axis was negatively correlated with corneal curvature（r=-0.494，P=0.041）.Conclusion Orthokeratology lens can effectively control the growth of ocular axis and improve the naked eye vision of juvenile myopia patients.It has good clinical efficacy and application value.

Key words： Orthokeratology lens Uncorrected visual acuity Diopter Ocular axis

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