Small-incision lenticule extraction versus femtosecond lenticule extraction for myopic:a systematic review and Meta-analysis

AIM： To examine differences in efficacy, accuracy, safety, aberrations and corneal biomechanical between Small incision lenticule extraction （SMILE） and femtosecond lenticule extraction （FLEx） for myopia. METHODS： Comprehensive studies were conducted on the PubMed, MEDLINE, EMBASE, and Cochrane Controlled Trials Register before 31 July, 2015. Meta-analyses were performed on the primary outcomes [loss of ≥2 lines of corrected distance visual acuity （CDVA）, uncorrected distance visual acuity （UDVA） ≥20/20, spherical equivalent （SE） within ±0.50 diopters （D）, final refractive SE], secondary outcomes were high-order aberrations （HOAs） and corneal biomechanical [central corneal thickness （CCT）, corneal hysteresis （CH） and corneal resistance factor （CRF）]. RESULTS： Seven trials describing a total of 320 eyes with myopia were included in this Meta-analysis. No significant differences were found in the efficacy [UDVA weighted mean difference （WMD） -0.01; 95%CI： -0.04 to 0.01; P=0.37, UDVA ≥20/20, OR 1.49; 95%CI： 0.78 to 2.86; P=0.23], accuracy （SE WMD -0.03; 95%CI： -0.12 to 0.07; P=0.58 , SE within ±0.5 D OR 1.25; 95%CI： 0.34 to 4.65; P=0.74）, HOAs （WMD -0.04; 95%CI： -0.09 to 0.01; P=0.14） and CCT WMD 1.83; 95%CI： -7.07 to 10.72; P=0.69, CH WMD -0.01; 95%CI： -0.42 to 0.40; P=0.97, CRF WMD 0.17; 95%CI： -0.33 to 0.67; P=0.50） in the last fellow-up. But for safety, FLEx may achieve fewer CDVA lost two or more two lines （OR 11.11; 95%CI： 1.27 to 96.86; P=0.03） than SMILE, however CDVA （WMD 0.00; 95%CI： -0.03 to 0.02; P=0.77） is similar. CONCLUSION： SMILE and FLEx are comparable in terms of both efficacy, accuracy, aberrations and corneal biomechanical measures in the follow-up,but FLEx seems to be better in safety measures. The results should be interpreted cautiously since relevant evidence is still limited, although it is accumulating. Further large-scale, well-designed randomized controlled trials are urgently needed.

Applications of SMILE-extracted lenticules in ophthalmology

AIM:To review recent innovations,challenges,and applications of small incision lenticule extraction(SMILE)extracted lenticule for treating ocular disorders.METHODS:A literature review was performed in the PubMed database,which was last updated on 30 December 2021.There was no limit regarding language.The authors evaluated the reference lists of the collected papers to find any relevant research.RESULTS:Due to the simplicity and accuracy of modern femtosecond lasers and the extensive development of SMILE surgery,many healthy human corneal stromal lenticules were extracted during surgery,motivating some professionals to investigate the SMILE lenticule reusability in different ocular disorders.In addition,new approaches had been developed to preserve,modify,and bioengineer the corneal stroma,leading to the optimal use of discarded byproducts such as lenticules from SMILE surgery.The lenticules can be effectively re-implanted into the autologous or allogenic corneas of human subjects to treat refractive errors,corneal ectasia,and corneal perforation and serve as a patch graft for glaucoma drainage devices with better cosmetic outcomes.CONCLUSION:SMILE-extracted lenticules could be a viable alternative to human donor corneal tissue.

Cap morphology after small-incision lenticule extraction and its effects on intraocular scattering

AIM： To investigate cap morphology after small-incision lenticule extraction （SMILE） and its effects on intraocular scattering. METHODS： Sixty-five eyes of 33 patients undergoing SMILE were enrolled. In addition to regular evaluation, Fourier-domain optical coherence tomography was used to investigate cap thickness at ld, lwk, 1 and 3mo postoperatively. The optical quality including modulation transfer function cutoff frequency, Strehl ratio, Optical Quality Analysis System （OQAS） values, and objective scattering index （OSI）, were evaluated using OQASTM. RESULTS： Cap thickness decreased from ld to lwk （P〈0.001）, but remained higher than intended thickness of 120 μm after 3mo （P〈0.001）. Cap thickness in central area was thinner than that of in the paracentral and peripheral areas （P〈0.0001）. Total number of microdistortions decreased from ld to 3mo （P〈0.0001）. Pearson analysis revealed a weak correlation between OSI and standard deviation of cap thickness at ld and lmo, as well as between range of cap thickness and OSI at 1mo. No correlation was found between microdistortion and OSI, but a negative correlation existed between microdistortion and range at ld and lmoafter surgery. CONCLUSION： The corneal cap tends to be more accurate and regular with time lapse. Better cap morphology tends to contribute less intraocular scattering in the eyes undergoing SMILE.

Delayed diffuse lamellar keratitis after small-incision lenticule extraction related to immunoglobulin A nephropathy:A case report

BACKGROUND Diffuse lamellar keratitis(DLK)is a complication of laser-assisted in situ keratomileusis(LASIK).This condition can also develop after small-incision lenticule extraction(SMILE)with a distinctive appearance.We report the case involving a female patient with delayed onset DLK accompanied by immunoglobulin A(IgA)nephropathy.CASE SUMMARY A 22-year-old woman was referred to our department for DLK and a decline in vision 1 mo after undergoing SMILE.The initial examination showed grade 2 DLK in the flap involving the central visual axis of the right eye.She was immediately administered with a large dose of a topical steroid for 30 d.However,the treatment was ineffective.Her vision deteriorated from 10/20 to 6/20,and DLK gradually worsened from grade 2 to 4.Eventually,interface washout was performed,after which her vision improved.DLK completely disappeared 2 mo after washout.Six months after SMILE,the patient was diagnosed with IgA nephropathy due to a 4-year history of interstitial hematuria.CONCLUSION DLK is a typical complication of LASIK but can also develop after SMILE.Topical steroid therapy was ineffective in our patient,and interface washout was required.IgA nephropathy could be one of the factors contributing to the development of delayed DLK after SMILE.

Three-year results of small incision lenticule extraction and wavefront-guided femtosecond laser-assisted laser in situ keratomileusis for correction of high myopia and myopic astigmatism

AIM： To compare and calculate the 3-year refractive results, higher-order aberrations （HOAs）, contrast sensitivity （CS） and dry eye parameters after small incision lenticule extraction （SMILE） and wavefront-guided femtosecond laser-assisted laser in situ keratomileusis （FS-LASIK） for correction of high myopia and myopic astigmatism. METHODS： In this prospective, non-randomized comparative study, 78 eyes with spherical equivalent （SE） of -8.11±1.09 diopters （D） received a SMILE surgery, and 65 eyes with SE of -8.05±1.12 D received a wavefront-guided FS-LASIK surgery with the VisuMax femtosecond laser （Carl Zeiss Meditec, Jena, Germany） for flap cutting. Visual acuity, manifest refraction, CS, HOAs, ocular surface disease index （OSDI） and tear break-up time （TBUT） were evaluated during a 3-year follow-up. RESULTS： The difference of uncorrected distance visual acuity （UDVA） postoperatively was achieved at lmo and at 3mo, whereas the difference of the mean UDVA between two groups at 3y were not statistically significant （t=-1.59, P=-0.13）. The postoperative change of SE was 0.89 D in the FS-LASIK group （t=5.76, P=0.00）, and 0.14 D in the SMILE group （t=-0.54, P=0.59） from lmo to 3y after surgery. At 3-year postoperatively, both HOAs and spherical aberrations in the SMILE group were obviously less than those in the FS-LASIK group （P=0.00）, but the coma root mean square （RMS） was higher in the SMILE group （0.59±0.26） than in the FS-LASIK group （0.29±0.14, P=0.00）. The mesopic CS values between two groups were not statistically significant at 3y postoperatively. Compared with the FS-LASIK group, lower OSDI scores and longer TBUT values were found in the SMILE group at Imo and 3mo postoperatively. With regard to safety, no eye lost any line of CDVA in both groups at 3y after surgery. CONCLUSION： Both SMILE and wavefront-guided FS- LASIK procedures provide good visual outcomes. Both procedures are effective and safe, but SMILE surgery achieve more stable long-term refractive outcome and better control of early postoperative dry eye as compared to FS-LASIK.

Dry eye and corneal sensitivity after small incision lenticule extraction and femtosecond laser-assisted in situ keratomileusis:a Meta-analysis

AIM：To assess the corneal sensitivity and the incidences of dry eye after small incision lenticule extraction（SMILE） and femtosecond laser-assisted in situ keratomileusis（FSLASIK）.METHODS：The Meta-analysis was performed using Rev Man 5.3.We searched on Pub Med from inception to March 2016.Summary weighted mean difference（WMD） and 95% confidence intervals（CIs） were used to analyze the datum.Random-effects or fixed-effects models were chosen up to between-study heterogeneity.The main outcomes were composed of the Ocular Surface Disease Index（OSDI） scores,tear film break-up time（TBUT）,Schirmer Test and corneal sensitivity.RESULTS：Eight eligible studies including 772 eyes（386 in SMILE group and 386 in FS-LASIK group） were identified.The parameters have no significiant difference heterogeneity between SMILE and FS-LASIK group preoperatively.There were significant differences between the two groups in OSDI scores at one and three months postoperatively,in TBUT at one and three months postoperatively,in corneal sensitivity at one week,about one month and three months postoperatively.However,there was no significant difference observed in Schirmer Test at the follow-up periods.CONCLUSION：Compare to FS-LASIK,dry eye and the corneal sensitivity recover better in the SMILE group,in first three months after the surgery.

Comparison of early changes in ocular surface markers and tear inflammatory mediators after femtosecond lenticule extraction and FS-LASIK

AIM:To compare the short-term impacts of femtosecond lenticule extraction(FLEx)and femtosecond laser-assisted laser in situ keratomileusis(FS-LASIK)on ocular surface measures and tear inflammatory mediators.METHODS:This prospective comparative nonrandomized clinical study comprised 75 eyes(75 patients).Totally 20 male and 15 female patients(age 21.62±3.25 y)with 35 eyes underwent FLEx,and 26 male and 14 female patients(age 20.18±3.59 y)with 40 eyes underwent FS-LASIK.Central corneal sensitivity,noninvasive tear breakup time,corneal fluorescein staining,Schirmer I test,tear meniscus height,and ocular surface disease index were evaluated in all patients.Tear concentrations of nerve growth factor(NGF),interleukin-1α(IL-1α),transforming growth factor-β1(TGF-β1),tumor necrosis factor-α(TNF-α),interferon-γ(IFN-γ),and matrix metalloproteinase-9(MMP-9)were assessed by multiplex antibody microarray.All measurements were performed preoperatively,and 1 d,1 wk,and 1 mo postoperatively.RESULTS:Patients who underwent FLEx exhibited a more moderate reduction in central corneal sensation and less corneal fluorescein staining than those in the FS-LASIK group 1 wk after the procedure(P<0.01).NGF was significantly higher 1 d and 1 wk after surgery in the FS-LASIK group than in the FLEx group(P<0.01).By contrast,compared to those in the FLEx group,higher postoperative values and slower recovery of tear TGF-β1,IL-1α,and TNF-αconcentrations were observed in the FS-LASIK group(P<0.01).Tear concentrations of NGF,TGF-β1,TNF-α,and IL-1αwere correlated with ocular surface changes after FLEx or FS-LASIK surgery.CONCLUSION:There is less early ocular surface disruption and a reduced inflammatory response after FLEx than after FS-LASIK.NGF,TGF-β1,TNF-α,and IL-1αmay contribute to the process of ocular surface recovery.

Research Progress on Ocular Surface Changes after Femtosecond Laser Small IncisionLenticule Extraction

The femtosecond laser has a number of advantages,.such as short pulse time,.high instantaneous power,.high repetition rate, low monopulse energy, and small thermal effect. Femtosecond laser-assisted small incision lenticule extraction(SMILE) is becoming the new direction in refractive surgery,and the ocular surface changes after SMILE are attracting increasingly more attention. This article reviews adverse effects,including dry eye, injury of corneal nerves, and ocular surface inflammation,.occurring after SMILE.

Comparison of clinical outcome of small-incision lenticule intrastromal keratoplasty and FS-LASIK for correction of moderate and high hyperopia

AIM:To compare the clinical outcome of small-incision lenticule intrastromal keratoplasty(s LIKE)and femtosecond laser-assisted in situ keratomileusis(FS-LASIK)for correction of moderate and high hyperopia.METHODS:A case-controlled clinical study was performed.Twenty right eyes of 20 moderate and high hyperopia patients underwent s LIKE(s LIKE group)and 22 right eyes of 22 moderate and high hyperopia patients underwent FS-LASIK(FS-LASIK group)were enrolled in this study from October 2015 to October 2017.Visual acuity,refractive error,corneal thickness,and keratometry were compared between the groups before and 1 y postoperatively.RESULTS:The postoperative uncorrected near visual acuity(UNVA)and uncorrected distance visual acuity(UDVA)were improved in the two groups.The UNVA reached J1 in 15 eyes(75.0%)in the s LIKE group and 5 eyes(22.7%)in the FS-LASIK group 1 y after surgery(χ2=11.476,P=0.001).The UDVA was equal or better than the preoperative CDVA in 16 eyes(80.0%)in the s LIKE group and 8 eyes(36.4%)in the FS-LASIK group,respectively(X2=8.145,P=0.004).No eyes lost any line of best-corrected visual acuity(BCVA)in either group.The amount of postoperative residual hyperopia in the s LIKE group was significantly less than in the FS-LASIK group(Z=-2.841,P=0.004).The postoperative keratometry and corneal thickness were significantly higher in the s LIKE group than in the FS-LASIK group(t=4.411,10.279,P<0.001).The SRI and SAI of the s LIKE group were significantly higher than that in the FS-LASIK group.There was no statistically significant difference in mean decentration between the two groups.CONCLUSION:s LIKE has better visual and refractive outcome than FS-LASIK for correction of moderate and high hyperopia.

SMILE和WG-FS-LASIK治疗低度无散光近视患者术后早期视觉质量比较

目的比较飞秒激光小切口角膜基质内透镜取出术(SMILE)和波前像差引导的准分子激光原位角膜磨镶术(WG-FS-LASIK)治疗低度无散光近视患者术后的早期视觉质量。方法选择2022年3月至6月在广西壮族自治区人民医院视光中心行SMILE治疗的患者15例(30眼,SMILE组),行WG-FS-LASIK治疗的患者15例(30眼,WG-FS-LASIK组)。所有患者术前无散光且最佳矫正视力所需最低球镜度数均≤-3.00 D。于术前和术后1 d、1周、1个月测量视力、全眼像差(慧差、三叶草像差和球差)、客观散射指数(OSI)、调制传递函数截止频率(MTF_(cut-off))、斯特列尔比(SR)、可预测对比度视力(PVA)(包括PVA 100%、PVA 20%、PVA 9%)。比较两组观察指标测量结果。结果两组术后等效球镜、视力情况均较术前显著改善(P<0.05),但两组各时间点比较差异无统计学意义(P>0.05)。两组术后OSI、SR、PVA 9%均较术前显著改善(P<0.05)。WG-FS-LASIK组在术后1 d、1周、1个月的OSI水平均显著低于SMILE组(P<0.05)。在术后1个月,WG-FS-LASIK组PVA 9%显著高于SMILE组(P<0.05)。SMILE组和WG-FS-LASIK组术后慧差均呈先上升后下降的趋势,但WG-FS-LASIK组变化幅度更小,在术后1 d、1周、1个月,WG-FS-LASIK组慧差小于SMILE组,差异有统计学意义(P<0.05)。结论SMILE和WG-FS-LASIK均能提高低度无散光近视患者术后早期视觉质量,但WG-FS-LASIK早期视力恢复更好,且夜间视觉质量改善更优。

飞秒激光小切口角膜基质透镜取出术治疗中度、高度近视的优势研究

目的 分析飞秒激光小切口角膜基质透镜取出术(SMILE)治疗中度、高度近视的优势。方法 回顾性分析2023年5月至2023年10月在本院行飞秒激光术治疗的100例中度、高度近视患者临床资料,根据术式将患者分为两组,行飞秒激光辅助的原位角膜磨镶术(FS-LASIK)者为A组(49例98眼),行SMILE者为B组(51例102眼)。分别比较两组中度、高度近视患者不同术式治疗后角膜形态、视觉质量参数、眼压、泪膜破裂时间、Schirmer Ⅰ值、眼部舒适度评分(Kolcaba评分)、眼部视觉模拟评分量表评分(VAS评分)的差异。结果 (1)两组中度、高度近视患者术后3个月,角膜后表面曲率、角膜后表面顶点高度、非球面因子Q值差异无统计学意义(P>0.05)。(2)术后1、7 d,两组Z_(3)^(1)、Z_(3)^(-1)比较差异无统计学意义(P>0.05);但B组角膜前表面高阶像差、Z_(4)^(0)均低于A组(P<0.05)。B组中度、高度近视患者术后角膜前表面高阶像差、Z_(4)^(0)均低于A组(P<0.05);两组术后Z_(3)^(1)、Z_(3)^(-1)比较差异无统计学意义(P>0.05)。(3)两组中度、高度近视患者术后3个月眼压、泪膜破裂时间、Schirmer Ⅰ值差异均无统计学意义(P>0.05)。(4)术后3个月,两组中度、高度近视患者眼压、泪膜破裂时间、Schirmer Ⅰ值、Kolcaba评分、VAS评分差异均无统计学意义(P>0.05)。结论 FS-LASIK、SMILE手术治疗均可实现对中度、高度近视患者屈光矫正效果,治疗后均可获得稳定角膜表面形态,患者主观眼部感受均良好,但SMILE术后短期内视觉质量提升优势显著。

SMILE和超薄瓣FS-LASIK矫正中度近视疗效比较

目的比较飞秒激光小切口角膜基质透镜取出术(SMILE)和超薄瓣飞秒激光辅助准分子激光原位角膜磨镶术(FS‐LASIK)矫正中度近视的临床疗效。方法回顾性病例对照研究。本研究纳入了年龄、性别和角膜厚度匹配合适的中度近视(等效球镜度-3.00~-6.00 D)患者,36例接受SMILE治疗患者的72只眼和36例接受超薄瓣FS‐LASIK治疗患者的72只眼。分别于术前及术后3个月记录所有患者的视力、屈光度及角膜高阶像差等变量,最后进行统计学分析以评估手术疗效。结果在术后随访3个月时,SMILE组和超薄瓣FS‐LASIK组疗效指数和安全指数比较,差异无统计学意义(t=1.179和-0.255,P=0.242和0.800)。SMILE组和超薄瓣FS‐LASIK组术后屈光度呈正视并相对稳定,术后等效球镜度比较差异无统计学意义(t=0.206,P=0.837)。SMILE组和超薄瓣FS‐LASIK组患者的角膜后表面曲率和非球面因子Q值比较,差异无统计学意义(t=-1.852和0.576,P=0.066和0.566)。SMILE组和超薄瓣FS‐LASIK组患者术前的总高阶像差、球差及彗差与术后比较,差异均具有统计学意义(均P<0.05)。在术后3个月时,SMILE组患者的总高阶像差及球差明显低于超薄瓣FS‐LASIK组(均P<0.05)。结论SMILE和超薄瓣FS‐LASIK两种术式矫治中度近视均安全有效,但SMILE组患者的术后总高阶像差及球差增加量低于超薄瓣FS‐LASIK组。

飞秒激光小切口角膜基质透镜取出术治疗近视性屈光参差

目的:探讨飞秒激光小切口角膜基质透镜取出术(SMILE)治疗近视性屈光参差的临床效果。方法:回顾性分析2021-01/2022-12于本院行SMILE或FS-LASIK治疗的近视性屈光参差患者76例146眼的临床资料,根据手术方式分为SMILE组(39例77眼)和FS-LASIK组(37例69眼)。比较两组患者术后1 wk,1、3 mo裸眼视力(UCVA)、屈光度、屈光参差度、角膜像差及术后并发症发生情况。结果:两组患者术后UCVA均较术前改善,彗差、三叶草、球差、总高阶像差均较术前显著增加(P<0.05),且FS-LASIK组患者彗差、三叶草、球差、总高阶像差显著高于SMILE组(P<0.05)。随访至术后3mo,SMILE组术后并发症发生率显著低于FS-LASIK组(5.2%vs 15.9%,P<0.05)。结论:SMILE与FS-LASIK均可有效提高近视性屈光参差患者UCVA,改善视觉质量,但SMILE术后角膜高阶像差更低、并发症发生率更小,整体效果更好。

飞秒激光小切口角膜基质透镜取出术术后并发症

飞秒激光小切口角膜基质透镜取出术(SMILE)是一种用于治疗屈光不正的无瓣飞秒激光辅助屈光手术。自2011年首次发表关于SMILE手术的研究以来,这种微创屈光手术因其无需制作角膜瓣,从而避免了相关并发症,已经迅速在眼科界受到青睐。此项创新性技术的优势包括:对角膜生物力学影响小、降低干眼风险以及减少基质层暴露。其在治疗近视和近视散光方面具有稳定性、安全性和有效性。尽管具有诸多优势,但该技术的实施仍具挑战性,并可能有各种术后并发症,如:干眼、感染性角膜炎、弥漫性板层角膜炎、暂时性光敏感综合征、角膜扩张、压力诱导层间基质角膜、角膜上皮内生、视觉相关变化等。为了获得最佳的屈光效果,应早期识别和适当的处理相关并发症。文章对SMILE术后各种并发症的危险因素、临床特点、处理及预防作一综述。

飞秒激光小切口角膜基质透镜取出术后加强手术的原因及临床效果

目的 分析飞秒激光小切口角膜基质透镜取出术(SMILE)后行经上皮准分子激光屈光性角膜切削术(T-PRK)加强手术的原因,观察其手术效果。方法 回顾性研究。选取2016年6月至2022年12月在郑州华厦视光眼科医院SMILE术后接受加强手术的19例(29眼)患者,从屈光度、眼轴、曲率、调节张力、术后干眼、出现时间及用药等方面分析其原因,观察加强手术的效果。结果 加强手术发生时间为SMILE术后7~48(26.59±16.02)个月。等效球镜度为-0.75~-3.65(-1.43±0.54)D,均为屈光回退。加强手术大多在SMILE手术开展早期。其中中度近视7眼,高度近视22眼。2眼角膜曲率>45 D,其他均<42 D。调节张力的变化,散瞳后球镜度低于常瞳下球镜度(P=0.005)。18岁患者接受加强手术前眼轴长度均高于SMILE术前,其他均低于SMILE术前。所有患者术后均有不同程度的干眼,以人工泪液滴眼及OPT强脉冲光治疗,治疗后泪河高度大于治疗前,泪膜破裂时间长于治疗前(P<0.05)。视力提高2行者5眼,3行者15眼,4行者9眼。马来酸噻吗洛尔眼液治疗后裸眼视力高于治疗前(P=0.023),可以延缓视力下降。加强手术后3个月患者裸眼视力均高于术前最佳矫正视力。结论 SMILE手术安全、稳定,但中高度近视、角膜扁平、眼轴进行性增长、调节张力大者以及术后有干眼者易进行加强手术。加强手术率低,T-PRK安全有效。

飞秒激光小切口角膜基质透镜取出术对不同程度近视患者术后干眼症发生率的影响

目的:探究飞秒激光小切口角膜基质透镜取出术(SMILE)对不同程度近视患者术后干眼症发生率的影响。方法:选择2018年1月—2020年6月在攀枝花学院附属医院眼科行SMILE治疗的90例近视患者,根据近视程度分为A组(低度近视)、B组(中度近视)、C组(高度近视),各30例(60眼)。对比三组干眼症发生率、泪液分泌实验(SchirmerⅠ试验)、泪膜破裂时间(BUT)、角膜荧光素染色(FL)、眼表疾病指数(OSDI)。结果:术后1周、1个月、3个月、6个月,C组干眼症发生率高于A组、B组,差异有统计学意义(P<0.05)。术后1周、1个月,三组SchirmerⅠ试验结果低于术前,且A组、B组高于C组,差异有统计学意义(P<0.05);术后3个月、6个月,C组SchirmerⅠ试验结果低于术前,且低于A组、B组,差异有统计学意义(P<0.05)。术后1周、1个月、3个月,三组BUT均低于术前,且C组低于A组、B组,差异有统计学意义(P<0.05);术后6个月,三组的BUT比较,差异无统计学意义(P>0.05)。术后1周、1个月,三组FL评分均高于术前,且C组FL评分高于A组、B组,差异有统计学意义(P<0.05);术后3个月、6个月,三组FL评分均低于术前,差异有统计学意义(P<0.05),但三组间FL评分比较,差异无统计学意义(P>0.05)。术后1周、1个月、3个月,三组OSDI评分均高于术前,差异有统计学意义(P<0.05);术后1周、1个月、3个月、6个月,三组组间OSDI评分比较,差异无统计学意义(P>0.05)。结论:高度近视患者SMILE术后干眼症发生率高于中度近视、低度近视患者,度数越高干眼症状越严重。

SMILE与FS-LASIK治疗屈光性近视患者的效果比较

目的:比较飞秒激光小切口角膜基质透镜取出术(SMILE)与飞秒激光辅助准分子激光原位角膜磨镶术(FS-LASIK)治疗屈光性近视患者的效果。方法:回顾性分析2021年6月至2023年7月该院收治的106例屈光性近视患者的临床资料,按照手术方法不同将其分为对照组和观察组各53例。对照组采用FS-LASIK治疗,观察组采用SMILE治疗。比较两组临床疗效,手术前后眼科指标(裸眼视力、眼压)水平、等效球镜度数,以及并发症发生率。结果:两组治疗总有效率和并发症发生率比较,差异均无统计学意义(P>0.05);术后7 d、1个月,两组眼压水平均低于术前,但观察组术后7 d高于对照组,两组裸眼视力水平均高于术前,且观察组术后7 d高于对照组,差异有统计学意义(P<0.05);术后3、7 d,两组等效球镜度数均低于术前,且术后3 d观察组低于对照组,差异有统计学意义(P<0.05)。结论:SMILE治疗屈光性近视患者可改善术后早期眼压、裸眼视力、等效球镜度数,效果优于FS-LASIK治疗,但二者治疗总有效率和并发症发生率相当。

飞秒激光小切口角膜基质透镜取出术治疗近视的效果

目的:探究飞秒激光小切口角膜基质透镜取出术(SMILE)治疗近视的效果。方法:选取2021年2月—2022年8月岳阳爱尔眼科医院收治的近视患者280例为研究对象,采用抽签法随机分为对照组和观察组,各140例(280眼)。对照组采用飞秒激光制瓣手术联合准分子激光角膜原位磨镶手术治疗,观察组采用SMILE治疗。比较两组患者视力指标[裸眼视力(UC-VA)、最佳矫正视力(BC-VA)及等效屈光度(SE)]、术后并发症、生活质量及满意度。结果:治疗后,两组UC-VA、BC-VA、SE水平及各项生活质量评分均高于治疗前,观察组UC-VA、BC-VA水平、心理功能、生理职能、环境评分、社会评分高于对照组,SE水平低于对照组,差异有统计学意义(P<0.05);观察组术后并发症发生率低于对照组,总满意度高于对照组,差异有统计学意义(P<0.05)。结论:应用SMILE治疗近视患者的视觉质量改善效果显著,可以提高患者视力水平和生活质量,并发症发生率较低,患者满意度较高。

Efficacy,predictability and safety of small incision lenticule extraction(SMILE)

Background:The purpose of this case series is to report the one-year outcomes of small incision lenticule extraction(SMILE)using the VisuMax®femtosecond laser.Methods:Two hundred and six patients were recruited for this retrospective,single center study at TRSC International LASIK Center in Bangkok,Thailand.Patients underwent SMILE,whereby an intrastromal lenticule was cut using a femtosecond laser and then manually extracted without the need for flap creation.Outcome measures included refraction,visual acuity and contrast sensitivity evaluation.Patients were treated and followed for one year.Results:SMILE for the correction of low to high myopia was performed on 347 eyes of 206 patients.The mean preoperative spherical equivalent was−4.96±1.88 diopters(D).On the first day following surgery,for eyes with a plano target refraction(99.14%of all eyes),uncorrected distance visual acuity(UDVA)was 20/20 or better in 90%of eyes.At the one week postoperative exam,the mean spherical equivalent was 0.01±0.36 D and UDVA was 20/20 or better in 84%of eyes.After one year follow-up,no eyes showed loss of 2 or more lines of visual acuity and 31%of eyes gained one or more lines.The photopic contrast sensitivity of SMILE treated eyes at 12 and 18 cycles per degree(cpd)improved from 1.59 and 0.94 preoperatively to 1.6 and 0.98,respectively,after one year.Conclusions:In this series,SMILE using the VisuMax®femtosecond laser demonstrated that after one year it is an effective,predictable and safe minimally invasive corneal refractive procedure.

Safety and efficacy of VisuMax®circle patterns for flap creation and enhancement following small incision lenticule extraction

Background:The purpose of this case series is to evaluate the safety and efficacy of VisuMax®Circle patterns in eyes that have undergone small incision lenticule extraction,thus creating a flap to perform an enhancement procedure or residual lenticule extraction.Methods:This prospective,single center,case study series evaluated the use of a VisuMax®Circle pattern to create a corneal flap following small incision lenticule extraction.Patients were treated and followed at TRSC International LASIK Center(Bangkok,Thailand)for 3 months to assess the efficacy and safety of the procedure.Efficacy was determined by the surgeon’s ability to lift the created corneal flap.Results:The study enrolled 28 eyes.Twenty-seven underwent the VisuMax®Circle pattern procedure for refractive enhancement,and one for residual lenticule extraction.In 100%of cases(28 eyes)the lifting of the flap was possible,as planned.In all cases of refractive enhancement(27 eyes)by laser in situ keratomileusis(LASIK),the exposure of the stromal bed was sufficient for the necessary excimer laser ablation.No eyes lost two or more Snellen lines of corrected distance visual acuity(CDVA)and no procedure or flap-related complications or serious adverse events occurred.Conclusions:This initial case series demonstrates that VisuMax®Circle pattern is efficacious and a suitable method to create a corneal flap for enhancement,following small incision lenticule extraction.