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The effect of orthokeratology on axial length elongation in children with myopia: Contralateral comparison study

  • Clinical Investigation
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Abstract

Purpose

To evaluate the effectiveness of the orthokeratology (OK) lens slowing myopic progression compared with no intervention in pediatric eyes

Methods

A retrospective review of medical records was performed on 45 monocular myopic subjects 7 to 13 years of age who were treated with monocular ortho-k lens and followed-up for more than 12 months. The monocular myopia in the subjects’ eyes was -0.75 to -4.25 D (diopter), and near emmetropia in the contralateral and with-the-rule astigmatism no greater than -1.50 D. Axial elongation OU, reflecting the progression of myopia was measured at baseline using the same AL-Scan Optical Biometer and compared between the two eyes of each individual every six months for one year in all subjects and for two years in 9 subjects.

Results

After 12 months of lens wear, axial length had increased by 0.36 ± 0.23mm in the control eyes (P < 0.001) but showed far less change (+0.07 ± 0.21 mm) in the OK eyes (P = 0.038). The nine subjects followed-up for 2 years showed no axial length change (+0.16 ± 0.25 mm) in the OK eyes (P = 0.095) after 24 months and significant axial length growth (+0.38 ± 0.26 mm; P = 0.002) in the control eyes. Control eyes showed progressive axial length growth throughout the study compared with the one OK lens eye.

Conclusions

Using a contralateral eye study design, which prevented the influence of potential confounding factors, Effectiveness of the OK lens was proved. Myopic progression within a subject was excellent compared with no intervention

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Acknowledgments

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Funding

The authors have no financial or proprietary interest in any of the materials or methods discussed in this study.

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Authors and Affiliations

  1. Department of Ophthalmology, Saevit Eye Hospital, 1065, Jungang-ro, Ilsandong-gu, Goyang, Gyeonggi-do, 10447, Republic of Korea

    Miri Na & Aeri Yoo

Authors
  1. Miri Na
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  2. Aeri Yoo
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Corresponding author

Correspondence to Aeri Yoo.

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Conflicts of interest

M. Na, None; A. Yoo, None.

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Na, M., Yoo, A. The effect of orthokeratology on axial length elongation in children with myopia: Contralateral comparison study. Jpn J Ophthalmol 62, 327–334 (2018). https://doi.org/10.1007/s10384-018-0573-x

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  • DOI: https://doi.org/10.1007/s10384-018-0573-x

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