Analysis of the Cause of Failure in the Correction of Childhood Myopia Using Orthokeratologic Lenses. |
Sung Hoon Lee, Dong Ho Lee, Hyung Keun Lee |
1Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. shadik@yuhs.ac 2Nowon Bit-Sa-rang Hospital, Seoul, Korea. 3Institute of Corneal Dystrophy Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. |
각막굴절교정학 렌즈를 이용한 소아 근시 교정 실패원인 분석 |
이성훈1⋅이동호2⋅이형근1,3 |
연세대학교 의과대학 안과학교실 시기능개발연구소1, 노원빛사랑안과의원2, 연세대학교 의과대학 안과학교실 각막이상증연구소3 |
|
Abstract |
PURPOSE To investigate the cause of failure in the correction of childhood myopia using orthokeratologic (Ortho-K) lenses. METHODS: The failure group was 29 patients who stopped wearing the lenses for various reasons, while the success group was 29 patients who bought lenses more than twiceand wore them for two years and more. Statistical analyses were performed to identify significant differences between the groups. RESULTS: Among the failure group, failure to continuously wear the Ortho-K lenses was attributed to undercorrection (19 patients), corneal erosion (2 patients), and sleep disorders (1 patient). Initial spherical diopter and initial spherical equivalent diopter showed statistical diffence between the success group and failure group. Of these two factors, as the initial spherical equivalent diopter increased, the chance of failure to use Ortho-K lens increased. According to a logistic multiple regression analysis, the odds of failure of using Ortho-K lens increased by 1.59 when the initial spherical diopter increased by 1. If the absolute value of the initial spherical diopter was over 6.24, the chance of failure increased by 80%. CONCLUSIONS: The failure of continuously wearing Ortho-K lenses due to undercorrection was found to be the major cause of failure in the correction of childhood myopia. The initial spherical diopter and initial spherical equivalent diopter were significant factors influencing the undercorrection. From these results, we predict that the odds of failure of continuously wearing Ortho-K lenses increases along with increases in the initial spherical diopter. In conclusion, clinicians should be warned concerning the odds of failure due to low initial spherical diopter. |
Key Words:
Childhood myopia;Odds of failure;Orthokeratologic lens;Spherical diopter |
|