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 ...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.展开更多
目的:比较飞秒激光小切口角膜基质透镜取出术(SMILE)中不同眼角膜帽厚度对近视散光患者术后散光及早期视觉质量的影响。方法:采用前瞻性对照研究,选取我院2020-06/2022-06接受SMILE手术的近视散光患者54例108眼,根据随机数字表法分为A组...目的:比较飞秒激光小切口角膜基质透镜取出术(SMILE)中不同眼角膜帽厚度对近视散光患者术后散光及早期视觉质量的影响。方法:采用前瞻性对照研究,选取我院2020-06/2022-06接受SMILE手术的近视散光患者54例108眼,根据随机数字表法分为A组、B组(各27例54眼),A组、B组角膜帽厚度设计分别为110、120μm,其余手术参数一致。比较两组患者术前及术后1 d,1 wk,1 mo的裸眼视力(UCVA)、等效球镜度(SE)、角膜硬度参数(SP-A1)、视觉质量和散光矢量分析结果等。结果:两组患者手术前后各时间点的UCVA、SE、SP-A1有时间差异(均P<0.05),术后1 d A组UCVA优于B组(P<0.05)。两组患者的散光矢量分析结果比较无差异(均P>0.05)。术后1 d A组的客观散射指数(OSI)低于B组,斯特列尔比(SR)高于B组(均P<0.05)。两组间术后调制传递函数截止频率(MTF cut off)、对比度视力、视觉症状及总体满意度、并发症发生率比较无差异(均P>0.05)。结论:110μm或120μm的角膜帽厚度在SMILE矫正近视散光方面均是安全有效的,且不影响术后的SE、散光、SP-A1以及对比度视力。110μm角膜帽厚度术后早期视力恢复更快且早期视觉质量优于120μm。展开更多
目的:评价准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)中应用Moria-M2角膜板层刀90刀头制作角膜瓣的安全性、可预测性及可重复性。方法:分别观察我院90刀头组制作角膜瓣500例1000眼及130刀头组制作角膜瓣510例1010眼...目的:评价准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)中应用Moria-M2角膜板层刀90刀头制作角膜瓣的安全性、可预测性及可重复性。方法:分别观察我院90刀头组制作角膜瓣500例1000眼及130刀头组制作角膜瓣510例1010眼,比较两种刀头制作角膜瓣术中角膜瓣形态、角膜瓣厚度、角膜瓣直径、角膜瓣蒂长及相关并发症。结果:90刀头组角膜瓣厚度为90～120(平均105.5±15.5)μm,130刀头组角膜瓣厚度为130～160(平均145±15)μm,差异有显著的统计学意义。两种刀头制作的角膜瓣,其角膜瓣直径、角膜瓣蒂长、弧度、角膜瓣形态及其他角膜瓣制作相关的并发症均无显著差异。结论:Moria-M2角膜板层刀90刀头制作角膜瓣具有良好的安全性、可预测性和可重复性,切削面洁净平整,操作及维护简单。展开更多
文摘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.
文摘目的:比较飞秒激光小切口角膜基质透镜取出术(SMILE)中不同眼角膜帽厚度对近视散光患者术后散光及早期视觉质量的影响。方法:采用前瞻性对照研究,选取我院2020-06/2022-06接受SMILE手术的近视散光患者54例108眼,根据随机数字表法分为A组、B组(各27例54眼),A组、B组角膜帽厚度设计分别为110、120μm,其余手术参数一致。比较两组患者术前及术后1 d,1 wk,1 mo的裸眼视力(UCVA)、等效球镜度(SE)、角膜硬度参数(SP-A1)、视觉质量和散光矢量分析结果等。结果:两组患者手术前后各时间点的UCVA、SE、SP-A1有时间差异(均P<0.05),术后1 d A组UCVA优于B组(P<0.05)。两组患者的散光矢量分析结果比较无差异(均P>0.05)。术后1 d A组的客观散射指数(OSI)低于B组,斯特列尔比(SR)高于B组(均P<0.05)。两组间术后调制传递函数截止频率(MTF cut off)、对比度视力、视觉症状及总体满意度、并发症发生率比较无差异(均P>0.05)。结论:110μm或120μm的角膜帽厚度在SMILE矫正近视散光方面均是安全有效的,且不影响术后的SE、散光、SP-A1以及对比度视力。110μm角膜帽厚度术后早期视力恢复更快且早期视觉质量优于120μm。
文摘目的:评价准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)中应用Moria-M2角膜板层刀90刀头制作角膜瓣的安全性、可预测性及可重复性。方法:分别观察我院90刀头组制作角膜瓣500例1000眼及130刀头组制作角膜瓣510例1010眼,比较两种刀头制作角膜瓣术中角膜瓣形态、角膜瓣厚度、角膜瓣直径、角膜瓣蒂长及相关并发症。结果:90刀头组角膜瓣厚度为90～120(平均105.5±15.5)μm,130刀头组角膜瓣厚度为130～160(平均145±15)μm,差异有显著的统计学意义。两种刀头制作的角膜瓣,其角膜瓣直径、角膜瓣蒂长、弧度、角膜瓣形态及其他角膜瓣制作相关的并发症均无显著差异。结论:Moria-M2角膜板层刀90刀头制作角膜瓣具有良好的安全性、可预测性和可重复性,切削面洁净平整,操作及维护简单。
