AIM:To investigate the change of intraocular pressure(IOP) for long stage after excimer laser in situ keratomo-leusis(LASIK) of myopia.METHODS:Thirty eyes of 15 patients(16 eyes of 8 patients in 6 months) who underwent myopia LASIK 5 years ago were selected randomly.IOP was measured preoperatively,2 weeks,1 month,6 months and 5 years after LASIK,respectively.RESULTS:The preoperative IOP was(17.48±3.06)m mHg,and the IOP of 2 weeks,1 month,6 months and 5 years after LASIK were(12.27±2.55)mmHg,(11.80±2.55)mmHg,(12.00±2.06)mmHg and(12.07±2.07)mmHg,respectively.There was no significant difference between IOP of 5 years after LASIK and IOP of 2 weeks,1 month and 6 months after LASIK(Z=-0.386,P>0.05;Z=-0.830,P>0.05;Z=-1.184,P>0.05).There was no significant difference among IOP of 2 weeks,1 month and 6 months after LASIK(H=1.444,P>0.05).The IOP of 2 weeks,1 month,6 months and 5 years after LASIK was lower than IOP before LASIK and there was significant difference among them(Z=-4.617,P<0.05;Z=-4.591,P<0.05;Z=-3.526,P<0.05;Z=-4.638,P<0.05).CONCLUSION:There is no significant difference between the IOP of long stage and short stage after LASIK.