Purpose: To examine the relationship between the effect of orthokeratology (Ortho-K) to suppress myopia progression and create higher-order wavefront aberration (HOA) in children.
Methods: This study involved 144 eyes of 72 children followed for 2-years after undergoing Ortho-K, and 3-weeks post Ortho-K. Wavefront aberration after 2-years Ortho-K and objective spherical equivalence (SE) under cycloplegia and axial length (AL) pre Ortho-K, 2-years after Ortho-K, and 3-weeks post Ortho-K was measured. HOA (i.e., coma-like aberration, spherical-like aberration, spherical aberration and total HOA of cornea and ocular 4mm-pupil) and correlation of the HOA and myopia progression was evaluated.
Results: Spherical-like aberration of cornea and change of objective SE were positive correlated (R=0.17, Pearson test). Coma-like, spherical-like, spherical, and total HOA of cornea/ocular and change of AL were negatively correlated (R=-0.20, -0.24, -0.19, -0.23, -0.22, -0.23, -0.21, and -0.23).
Conclusion: Ortho-K increased HOA of cornea and ocular 4mm-pupil in childhood myopia, and suppressed myopia in proportion to highly aberrated optics. HOA increase possibly suppresses myopia.
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