Effects of femtosecond-excimer laser in-situ keratomileusis guided by corneal topography in treatment of patients with myopia and astigmatism
Objective:To observe effects of femtosecond-excimer laser in-situ keratomileusis(FS-LASIK)guided by corneal topography in treatment of patients with myopia and astigmatism.Methods:A prospective study was conducted on 68 patients(136 eyes)with myopia and astigmatism admitted to the hospital from July 2018 to July 2023.According to the random number table method,they were divided into control group and observation group,34 cases(68 eyes)in each group.The control group was treated with routine FS-LASIK,while the observation group was treated with FS-LASIK guided by corneal topography.The levels of visual acuity[uncorrected visual acuity(UCVA),best corrected visual acuity(BCVA),spherical equivalent(SE)],the corneal higher-order aberrations[total higher-order aberration(HOA),coma(Coma),spherical aberration(SA)],the astigmatism correction indexes[success index(IOS),flattening index(FI),correction index(CI)]levels,and the incidence of complications were compared between the two groups before and after the treatment.Results:3 months after the surgery,the SE levels of the two groups were higher than those before the surgery,that in the observation group was higher than that in the control group,and the differences were statistically significant(P<0.05).The levels of BCVA and UCVA in the two groups were lower than those before the surgery,but there was no significant difference between the two groups(P>0.05).The levels of HOA,Coma and SA in the two groups were higher than those before the surgery,but those in the observation group were lower than those in the control group,and the differences were statistically significant(P<0.05).The levels of IS and CI in the observation group were lower than those in the control group,the level of FI was higher than that in the control group,and the differences were statistically significant(P<0.05).No complications occurred in both groups.Conclusions:FS-LASIK surgery guided by corneal topography for the patients with myopia and astigmatism can improve the spherical equivalent levels,improve the levels of astigmatism correction indexes,and reduce the levels of corneal higher-order aberrations.Moreover,it is superior to the routine FS-LASIK.
NETL
NSTL
万方数据
