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Comparison of ocular higher-order aberrations before surgery and at postoperative 1, 3, and 6 months. Coma, Z(3,1), trefoil, Z(3,3), and spherical aberration, Z(4,0), were measured using the WaveScan at a mean diameter of 6 mm (n = 5 for each group, P ≥ 0.101).
