[The analysis of subjective evaluation and contrast sensitivity function after wavefront-guided laser in situ keratomileusis and traditional laser in situ keratomileusis].

OBJECTIVE: To investigate subjective visual performance after wavefront-guided LASIK and traditional LASIK. METHODS: Ninety-eight eyes of 98 patients were divided into group Zyoptix and group PlanoScan. Subjective evaluation, contrast sensitivity function (CSF) and aberration were observed preoperatively and postoperatively. RESULTS: On subjective evaluation about halo, night visual acuity and blur, Group Zyoptix was better than Group PlanoScan. The difference between Group Zyoptix and Group PlanoScan was shown at all spatial frequencies, especially at low and middle spatial frequencies under mesopic conditions. The difference of aberration between two groups was obvious. Both of low order and higher order aberration were correlated with subjective evaluation and CSF, especially defocus and spherical aberration, whose influence were in reverse with vertical coma and higher order aberration without spherical aberration. CONCLUSION: The subjective evaluation and CSF after wavefront-guided LASIK were better than traditional LASIK, which correlated with aberration, especially in defocus and spherical aberration, while the join of vertical coma can partially counteract their influence on patients' subjective evaluation and CSF.