Abstract
Purpose
To investigate the effects of overnight orthokeratology (OK) lenses wear on the interocular
axial length (AL) difference in anisomyopic children.
Methods
Sixty anisomyopic children (8–14 years old) were enrolled in this one-year prospective,
randomised controlled study. Subjects were randomly assigned to wear OK lenses (OK
group) or single-vision spectacles (control group). AL was monitored at baseline and
every six months using an IOL Master biometer, and axial elongation and interocular
AL differences were compared between the groups.
Results
In the control group, the more myopic eyes had similar axial elongation (0.36 ± 0.17 mm)
to the less myopic eyes (0.37 ± 0.17 mm) at the one-year follow-up (P > 0.05). In the OK group, the less myopic eyes exhibited significantly greater axial
elongation (0.24 ± 0.17 mm) than the more myopic eyes (0.13 ± 0.13 mm) at the one-year
follow-up (P < 0.05). The mean interocular AL difference significantly decreased in the OK group
over one year, from 0.47 ± 0.24 mm to 0.35 ± 0.22 mm (P < 0.05). However, the mean interocular AL difference decreased only slightly in the
control group, from 0.56 ± 0.28 mm to 0.55 ± 0.28 mm (P > 0.05).
Conclusion
This randomised, controlled study demonstrated that OK reduces the interocular AL
difference in anisomyopic children due to stronger myopic control of the more myopic
eye.
Abbreviations:
OK (orthokeratology), AL (axial length)Keywords
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Article info
Publication history
Published online: November 13, 2021
Accepted:
November 6,
2021
Received in revised form:
November 3,
2021
Received:
June 25,
2021
Identification
Copyright
© 2021 Published by Elsevier Ltd on behalf of British Contact Lens Association.
