AIM:To evaluate the effect of laser in situ keratomileusis(LASIK) and laser subepithelial keratomileusis(LASEK) on the choroidal blood flow by comparing and analyzing the ocular pulse amplitude(OPA) values before and after LASIK and LASEK·METHODS:After routine check all patients were devided into two groups and each group had 20 patients(39 eyes).After measured central corneal thickness(CCT) and corneal curvature(CCV) by Pentacam system,the two group patients which would be treated by LASIK or LASEK operation were measured intraocular pressure(IOP) and OPA by the dynamic contour tonometry(DCT) before operation and one month after operation.Finally the statistical analysis were adopted to evaluate the measurement results·RESULTS:There was no statistical difference between the OPA values of the LASIK patients or the LASEK patients before and after operation(P>0.05),and the OPA values had no statistical difference between the LASIK patients and the LASEK patients before and one month after operation(P>0.05)·CONCLUSION: LASIK and LASEK operation don’t affect the choroidal blood flow.