Fig. 1

Pre- and postoperative differences in horizontal coma (Z₃¹) and primary spherical aberration (Z₄⁰). (a) The preoperative differences in horizontal coma and primary spherical aberration are not significant; two-sample paired t-test. (b) Postoperatively, the two aberrations are higher under mesopic illumination than under photopic illumination; two-sample paired t-test. *Significant difference in aberration values between mesopic and photopic illumination. The upper and lower error bars represent the upper and lower quartiles, respectively. (Z₃¹, horizontal coma; Z₄⁰, primary spherical aberration).