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Comparison of Myopic Progression before and after Orthokeratology Lens Treatment
각막굴절교정렌즈 착용 전후 근시 진행의 변화
JKOS 2019 Jul;60(7):620-6
Published online July 15, 2019;
Copyright © 2019 The Korean Ophthalmological Society.
PDF Download Count: 76 / View Count: 75

Ho Gil Jung, MD, Kyoung Yong Lee, MD, Gi Hyun Bae, MD

Department of Ophthalmology, Sahmyook Medical Center, Seoul, Korea
삼육서울병원 안과
Received November 19, 2018; Revised January 3, 2019; Accepted June 25, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Purpose: To compare the myopic progression before and after wearing an orthokeratology lens (OK).
Methods: Twenty-six patients (49 eyes) with at least 6 months of myopia prior to OK treatment were evaluated. Changes in the spherical equivalent (SE) refractive error and axial length were compared before and after OK use. Changes in the SE and axial length were also compared between two groups according to the myopic progression before baseline: Group 1 with myopic progression < 1 D/year and Group 2 with myopic progression > 1 D/year.
Results: The myopic progression rate decreased from -1.1 to -0.3 D/year after OK treatment (p < 0.001). Greater increases in axial length were observed in patients who were younger and had less myopia at baseline, a higher rate of myopia progression before baseline, and a shorter axial length at baseline (p < 0.001, p < 0.004, p < 0.007, and p < 0.001, respectively). The increase in axial length was significantly greater in the group with greater myopic progression before baseline (0.2 mm/year) than in the group with less myopic progression (0.1 mm/year) (p = 0.001).
Conclusions: Myopic progression was reduced significantly after OK treatment.
Keywords : Myopia, Orthokeratology, Progression


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