Effects of Orthokeratology on Eye Growth in Children
Author Information
Author(s): Tan Qi, Kojima Randy, Cho Pauline, Vincent Stephen J.
Primary Institution: School of Optometry, The Hong Kong Polytechnic University
Hypothesis
Does the back optic zone diameter of orthokeratology lenses affect axial elongation in children?
Conclusion
Children wearing 5-mm back optic zone lenses experienced less axial elongation compared to those wearing 6-mm lenses over two years.
Supporting Evidence
- Participants in the 5-mm BOZD group displayed less axial elongation than the 6-mm BOZD group over 2 years.
- A greater volumetric MDD was observed in the 5-mm BOZD group compared with the 6-mm BOZD group.
- Less axial elongation was associated with a greater volumetric MDD at the 1- and 24-month visits.
Takeaway
Kids who wore special contact lenses that are smaller in the middle had less eye growth than those with bigger lenses.
Methodology
Data from 80 children wearing orthokeratology lenses was analyzed over 2 years, comparing those with 5-mm and 6-mm back optic zone diameters.
Potential Biases
Potential bias due to the specific lens design used and the lack of analysis on treatment zone characteristics.
Limitations
Only corneal metrics for a fixed 5-mm pupil diameter were analyzed, and the actual pupil diameter of each individual was not considered.
Participant Demographics
Children aged 6 to less than 11 years, primarily of Chinese ethnicity.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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