Effect of Orthokeratologic Lenses on Myopic Progression in Childhood.
10.3341/jkos.2013.54.3.401
- Author:
Jae Ryung KIM
1
;
Tae Young CHUNG
;
Dong Hui LIM
;
Ji Hyun BAE
Author Information
1. Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. tychung@skku.edu
- Publication Type:Original Article
- Keywords:
Myopic progression;
Overnight orthokeratology;
Spherical equivalent refractive error;
White-to-white diameter
- MeSH:
Child;
Humans;
Refractive Errors
- From:Journal of the Korean Ophthalmological Society
2013;54(3):401-407
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: The present study assessed the influence of overnight orthokeratology (ortho-k) on the myopic progression in Korean children and analyzed factors affecting myopic progression. METHODS: The ortho-k group was comprised of 31 patients satisfying the inclusion criteria for ortho-k. In the ortho-k group, spherical equivalent refractive error (SER) was measured at baseline, and after 2 weeks, 6 and 12 months. The control group was comprised of 31 patients who were matched according to age, gender, and baseline SER of the ortho-k subjects. RESULTS: In the ortho-k group, the mean +/- SD changes in SER from 2 weeks to 6 months, 6 to 12 months, and 2 weeks to 12 months were -0.17 +/- 0.50 D, -0.04 +/- 0.76 D, and -0.21 +/- 0.78 D, respectively. In the control group, the changes in SER from baseline to 6 months, 6 to 12 months, and baseline to 12 months were -0.38 +/- 0.42 D, -0.44 +/- 0.38 D, and -0.82 +/- 0.68 D, respectively. Significant differences were found between changes in SER from 6 to 12 months and from baseline to 12 months (p < 0.05). In the ortho-k group, relationships between the changes of SER for 1 year and the numeric values of baseline measurements were analyzed. When comparing the results between the group of SER change > or = -0.5 D with the group of SER change < -0.5 D, numeric values of white-to-white diameters of the 2 groups were different, and a significant correlation was found between the range of SER change and the white-to-white diameter (Pearson's r = -0.471, p = 0.008). CONCLUSIONS: Ortho-k is effective for slowing myopic progression. The smaller the white-to-white diameter, the slower the myopic progression could be.
