Abstract:AIM: To explore the changes of intraocular pressure measured by noncontact tonometer(IOPNCT)with high myopia and analyze the relative fators after small incision lenticule extraction(SMILE).
METHODS: A retrospective study. Totally 108 cases(216 eyes)with high myopia received SMILE during March 2015 to October 2016 were involved. The IOPNCT, corneal central thickness(CCT)and corneal curvature for 3mo were recorded and analyzed by ANOVA, LSD t test. The Pearson correlation analysis and multiple linear regression model analysis were used to evaluate the relationship between IOPNCT and its influence factors.
RESULTS:(1)There was significant statistical difference in IOPNCT after SMILE at 1d, 1wk, 1 and 3mo compare with preoperative(t=17.785, P=0.019; t=17.981, P=0.016; t=18.841, P=0.012; t=19.364, P=0.001); the IOPNCT after SMILE decreased. The IOPNCT values at every time after SMILE was no statistical difference(t=1.871, P=0.818; t=3.062, P=0.328; t=1.143, P=0.373).(2)The IOPNCT in high myopia were positive correlated with CCT and corneal curvature after SMILE(r=0.4356, 0.295; P<0.05), respectively.(3)The multiple linear regression model analysis revealed that Y=-14.601+0.348X1+0.03X2(Y was IOPNCT, X1 was corneal curvature, X2 was CCT,P<0.001); Y=3.679+0.28X1+0.012X2(Y was△IOPNCT,X1 was variation of corneal curvature,X2 was△CCT, P<0.001).
CONCLUSION: The IOPNCT decreased after SMILE in high myipia, and it showed that there was no significant influence to use glucocorticoid eye drops in short terms. There was positive correlation among IOPNCT, CCT and corneal curvature after SMILE.
