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- W2348625833 abstract "Objective:To assess the long term effect and safety of myopia correction with Ortho K lenses,and to understand the effects associated with Ortho K for controlling myopia development.Methods:166 eyes of 86 adolescent myopia patients who had worn Ortho K lenses for over two years were studied. Age ranged from 10 to 25 years of age;the average age was(15.5±2.6)years. The mean refraction was(-4.02±1.78)D(-1.5～-7.0 D). Corneal curvature,corneal topography,corneal thickness,axial length and intraocular pressure were measured before and after Ortho K wear. The mean time period was(28.25±3.74)months.Results:Before Ortho K wear,mean uncorrected visual acuity(UCVA) was 0.21±0.10,after Ortho K wear it was 0.99±0.23,and the difference was significant(P0.01). Before Ortho K wear,the mean horizontal corneal curvature was(43.05±1.10)D;after Ortho K wear it was(40.84±1.38)D. The mean axial length was(24.93±0.82)mm and (25.16±0.82)mm before and after Ortho K wear,respectively. It had increased by (0.12±0.41)mm with each year. The mean corneal thickness was(0.565±0.030)mm and (0.557±0.034)mm before and after Ortho K,respectively. There was a thining of the cornea after Ortho K wear. The difference was 0.009 mm,and it was significant(P0.01). Mean intraocular pressure was(15.95±2.92)mmHg and (15.35±2.60)mmHg before and after Ortho K wear,respectively. It decreased 0.60 mmHg after Ortho K wear,and the difference was also significant(P0.01). Spotty corneal infiltration occurred in 79 eyes while wearing Ortho K lenses,with an incidence of 47.31%.Conclusion:Ortho K lenses have apparent and stable effects on mild and moderate myopia during a two year observation period. However,these lenses cannot completely control myopia development yet. There are no apparent pathological changes in corneal thickness and intraocular pressure before and after wearing Ortho K lenses. Under the close supervision of a clinical doctor,keratitis can be prevented and controlled by using antibiotic drops,cleaning Ortho K lenses carefully and renewing the lenses in a timely manner." @default.
- W2348625833 created "2016-06-24" @default.
- W2348625833 creator A5057112086 @default.
- W2348625833 date "2004-01-01" @default.
- W2348625833 modified "2023-09-25" @default.
- W2348625833 title "Clinical indices in the detection of myopia correction after two years of Ortho-K lenses wear" @default.
- W2348625833 hasPublicationYear "2004" @default.
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