AIM: To evaluate the distribution of myopic patients' ocular dominance before LASIK operation and the relationship of vision and visual function changes after LASIK operation.

METHODS:A total of 235 myopic patients(470 eyes)who were going to undergo myopic LASIK were included in this study. The ocular dominance was examined by card-hole method before LASIK operation and checked 1 month, 3, 6, 12 months after operation. The patients' best-corrected visual acuity(BCVA)before operation and the visual acuity after LASIK operation were compared with ocular dominance and non-ocular dominance, and then measured by the questionnaire of vision function.

RESULTS:The right ocular dominance was common in myopic patients, occupying 67.2%. There was good consistency between ocular dominance and BCVA eye, the coincidence was 81.1%. There were not any changes of ocular dominance in 220 cases, but 15 cases changed the ocular dominance, five of them were exotropias(>15°).

CONCLUSION: There are more right ocular dominance in myopic patients and most of them was best-corrected visual eye. The visual activity of ocular dominance's changing or exchanging ocular dominance had effects on euphoropsia in early postoperation but few effects finally.