Fig. 1From: Weighted Zernike defocus coefficient of treatment zone is a meaningful indicator for myopia control efficacy of Ortho-K lensesReconstruction of tangential power difference map after Ortho-K treatment. a Two-dimensional original tangential power difference map; b Real tangential power difference map in three-dimensional space; c Reproduction of tangential power difference map by Zernike fittingBack to article page