Observation on Effect of Small Incision Lenticule Extraction on Refractive Errors
Objective To observe the effect of femtosecond laser-assisted laser in situ keratomileusis(FS-LASIK)and small incision lenticule extraction(SMILE)for the treatment of refractive errors.Methods The clinical data of 85 patients(169 eyes)with refractive errors admitted to our hospital between May 2020 and May 2022 were collected.The patients were divided into two groups by surgical methods:a FS-LASIK group(42 cases,83 eyes),for which the wavelength of the femtosecond laser used was 1 053 nm and energy 130 nJ,and the wavelength of the excimer laser used was 193 nm and energy density 150 mJ/cm2,and a SMILE group(43 cases,86 eyes),for which the wavelength of the femtosecond laser used was 1053nm and energy 130 nJ.The visual acuity[best corrected visual acuity(BCVA)and un-corrected visual acuity(UCVA)],refractive power[spherical(S),cylinder(C)and spherical equivalent(SE)],dry eye examination results[tear break-up time(TBUT),ocular surface disease index(OSDI)score and Schirmer test(SIt)]before and 3,6 and 12 months after the surgery were compared respectively.The visual sensitivity was also compared before and 12 months after the surgery respectively.Results For both groups,the UCVA was not different from the preoperative BCVA 3,6 and 12 months after the surgery(P＞0.05).The difference between the two groups in UCVA and proportion of cases with UCVA reaching or exceeding preoperative BCVA to all cases was not great at any time point(P＞0.05).For both groups,the S,C and SE were lower 3,6 and 12 months after the surgery than before the surgery,but the difference between the two groups in S,C and SE was not great at any time point(P＞0.05).However,the SE changes in the SMILE group from 3 to 12 months after the surgery were much smaller than those in the FS-LASIK group(P＜0.05).For both groups,the TBUT and Slt decreased 3 months after the operation,but increased gradually 6 and 12 months after the operation.Moreover,the TBUT in the SMILE group was longer/higher than those in the FS-LASIK group 3,6 and 12 months after the surgery(P＜0.05),which basically returned to the preoperative levels 12 months after the operation.The OSDI scores in both groups increased 3 months after the operation,but gradually decreased 6 and 12 months after the operation.Moreover,the OSDI scores of the SMILE group were lower than those of the FS-LASIK group 3,6 and 12 months after the surgery(P＜0.05),which basically returned to preoperative levels 12 months after the operation.For both groups,the visual sensitivity of 10％,25％,75％and 100％contrast was improved 12 months after the surgery,and the improvement was greater in the SMILE group than in the FS-LASIK group(P＜0.05).Conclusions Both FS-LASIK and SMILE will effectively improve patients'vision and refractive error status,but SMILE features longer stability in improving postoperative refractive power,less impact on the postoperative eye surface and faster recovery thanks to shorter duration of dry eye symptoms caused by the surgery.Furthermore,SMILE will improve patients'visual sensitivity and visual quality.
NETL
NSTL
万方数据
