J Korean Ophthalmol Soc > Volume 59(11); 2018 > Article
Journal of the Korean Ophthalmological Society 2018;59(11):1009-1016.
DOI: https://doi.org/10.3341/jkos.2018.59.11.1009    Published online November 15, 2018.
Comparative Effect of Spectacles and Orthokeratology Lenses on Axial Elongation in Children with Mild-to-Moderate Myopia.
Tae Hee Kim, Myung Hun Kim, Joo Young Kwag, Jin Seok Choi, Kyu Hong Pak, Kyeongwook Lee, Taeseong Park, Sung Kun Chung, Joo Hyun
1Saevit Eye Hospital, Goyang, Korea. jjulujjulu@hanmail.net
2Jalboneun Seoul Eye Clinic, Hwaseoung, Korea.
중등도 이하 소아 근시에서 안경과 각막굴절교정렌즈 착용이 안축장 성장에 미치는 영향 비교
김태희1⋅김명훈2⋅곽주영1⋅최진석1⋅박규홍1⋅이경욱1⋅박태성1⋅정성근1⋅현 주1
새빛안과병원1, 잘보는서울안과의원2
Correspondence:  Joo Hyun,
Email: jjulujjulu@hanmail.net
Received: 3 May 2018   • Revised: 7 July 2018   • Accepted: 30 October 2018
To assess the effect on axial elongation and associated factors between spectacles and of orthokeratology lens (OK) wearing in children with mild to moderate myopia. METHODS: A total of one hundred subjects, ranging in age from 6 to 13 years, and with mild to moderate myopia no more than −4.50 diopters in spherical equivalent, visited our clinic from 2013 to 2015. The OK group (75 eyes) and the spectacles group (64 eyes) were compared and analyzed on the axial elongation and associated factors. RESULTS: In the OK group, axial length was elongated in 1 year period with a mean increase of 0.24 ± 0.29 mm. In spectacles group, axial length was elongated in 1 year period with a mean increase of 0.42 ± 0.20 mm. The statistically significant suppression of axial elongation was observed in OK group compared to the spectacles group (Mann-Whitney U test, p < 0.05). For OK group, the age of starting OK (Pearson's correlation, r = −0.481, p < 0.05) was the only influencing factor on axial elongation, which had negative correlation with axial elongation. In spectacles group, the age of starting spectacles had negative correlation with axial elongation (Pearson's correlation, r = −0.462, p < 0.05) and baseline spherical equivalent, spherical diopter, cylindrical diopter from manifest refraction had positive correlation with axial elongation. Comparison of axial elongation in orthokeratology lens group and spectacles group by age groups (6 to 9 years [28 eyes], 9 to 13 years [47 eyes]), 9 to 13 years of orthokeratology lens group had the stronger suppression of axial elongation (Mann-Whitney U test, p < 0.05). CONCLUSIONS: The OK effectively suppresses axial elongation compared to the spectacles. Although the patients are in age from 9 to 13 years, the axial elongation was effectively suppressed.
Key Words: Axial elongation;Myopia;Orthokeratology lens

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