RESUMO
@#AIM: To observe the visual acuity changes within 24h after femtosecond laser small incision lenticule extraction(SMILE)and femtosecond laser <i>in situ </i>keratomileusis(FS-LASIK)for myopia.<p>METHODS: A retrospective analysis was made of 80 myopic patients(160 eyes)who underwent corneal refractive surgery in our hospital from August 2017 to March 2018. They were divided into two groups according to different surgical methods, 40 cases(80 eyes)in SMILE group and 40 cases(80 eyes)in FS-LASIK group. The visual acuity, intraocular pressure, corneal endothelial cells, intraoperative and postoperative complications were observed within 24h.<p>RESULTS: The operation was successfully completed in both groups. The uncorrected visual acuity(UCVA)of SMILE group and FS-LASIK group improved gradually at 2, 4, 6, 8, 12 and 24h after operation. At 2, 4, 6, 8, 12, 24h after operation, the UCVA of FS-LASIK group was better than that of SMILE group, and the difference was statistically significant(<i>P</i><0.05). The UCVA of SMILE group was the best 12 and 24h after operation, and that of FS-LASIK group was the best 6 and 24h after operation. The results of intragroup comparison before and after operation showed that the intraocular pressure(IOP)of the two groups was lower than that before operation, the density of corneal endothelial cells, the coefficient of variation were significantly decreased, the area of corneal endothelial cells and the proportion of hexagonal cells were significantly increased; the difference was statistically significant(<i>P</i><0.01). The results of comparison between groups after operation showed that there was no significant difference in intraocular pressure and corneal endothelial cell related indexes between the two groups(<i>P</i>>0.05). No serious complications occurred during and after operation in both groups.<p>CONCLUSION: Within 24h after SMILE and FS-LASIK, the visual acuity changed greatly, and good visual acuity was obtained.
RESUMO
@#AIM: To explore the clinical effect of small incision lenticule extraction(SMILE)and femtosecond laser <i>in situ</i> keratomileusis(FS-LASIK)in correcting high myopia and the effect on cornea and tear film stability. <p>METHODS: Totally 120 patients with high myopia treated in the hospital from August 2016 to February 2017 were selected as the research subjects. According to the surgical methods, the patients were divided into SMILE group and FS-LASIK group, 67 cases 134 eyes in SMILE group and, and 53 cases 106 eyes in FS-LASIK group. Group SMILE was treated with SMILE, and group FS-LASIK was treated by FS-LASIK. The influence of normal vision and stability of cornea and tear film. <p>RESULTS: There was no significant difference in uncorrected visual acuity(UCVA), best corrected visual acuity(BCVA)and diopter between two groups after 1mo and 3mo(<i>P</i>>0.05). There was no significant difference in BUT and SⅠt between the two groups of patients before and 1mo after operation(<i>P</i>>0.05). After 3mo between the two groups, BUT and SⅠt in the two groups were statistically different, and the SMILE group was significantly better than the FS-LASIK group(<i>P</i><0.001). There was no significant difference between the two groups of corneal thinning point and posterior vertex height at preoperative and postoperative 1 and 3mo(<i>P</i>>0.05). <p>CONCLUSION: SMILE and FS-LASIK are equally safe and effective and have good predictability and stability. The postoperative tear film stability is superior to FS-LASIK, and there is no significant difference in the biomechanical stability of the two kinds of methods.