Objective To assess the time course of Q value after myopic laser-assisted in situ keratomileusis(LASIK) and preliminarily evaluate the determinants of the difference of Q value between before and after LASIK.Methods ...Objective To assess the time course of Q value after myopic laser-assisted in situ keratomileusis(LASIK) and preliminarily evaluate the determinants of the difference of Q value between before and after LASIK.Methods We performed a retrospective,longitudinal investigation on patients undergoing wavefront optimized LASIK therapy for emmetropization.A total of 418 eyes from 222 cases were examined preoperatively,and partly followed up at one week(172 eyes),one month(134 eyes) and three months(51 eyes) after surgery.The horizontal,vertical and total Q values of cornea were calculated from eccentricity measured at the central 6-mm corneal zones respectively.Potential determinants of the change of Q value were analyzed using multiple linear regressions.Results The mean Q value was-0.17±0.13 preoperatively,and 0.99±0.70,0.97±0.66,and 0.86±0.41 one week,one and three months postoperatively,respectively.One way analysis of variance(ANOVA) demonstrated significant differences between measurements made before surgery and at all postoperative times(at one week,one and three months;all P<0.0001,Bonferroni post hoc),but no significant differences were found among postoperative groups.Significant differences of Q values between horizontal and vertical meridians were found before surgery and at all postoperative times(all P<0.0001).Multiple regression analysis revealed that change of Q value significantly correlated with manifest refraction spherical equivalent(r=0.116,P<0.0001) and axial length(r=0.264,P<0.0001).Conclusions Over the study period,the primary changes in Q value occur within 1 week after surgery,and then become slightly decreased and nearly stable.Manifest refraction spherical equivalent and axial length play a significant role in the change of postoperative Q value.展开更多
目的:探讨FS-LASIK设置6.0mm和6.5mm两种光学区直径对术后视觉质量的影响。方法:本研究为前瞻性研究。选取行FS-LASIK手术的患者25例50眼,随机预设置患者双眼光学区切削直径6.0mm或6.5mm,并按光学区直径分为6.0mm及6.5mm两组。术后3mo...目的:探讨FS-LASIK设置6.0mm和6.5mm两种光学区直径对术后视觉质量的影响。方法:本研究为前瞻性研究。选取行FS-LASIK手术的患者25例50眼,随机预设置患者双眼光学区切削直径6.0mm或6.5mm,并按光学区直径分为6.0mm及6.5mm两组。术后3mo对两组患者进行Sirius三维眼前节分析系统测量角膜高阶像差(包括3、5、7mm瞳孔直径下的总高阶像差、球差、彗差及三叶草差)以及OQASⅡ视觉质量分析仪比较MTF截止空间频率(MTF cut off)、斯特列尔比值(SR)和客观散射指数(OSI)、不同模拟对比度视力(OV100%、OV20%、OV9%),并对两组患者进行OSDI干眼相关视觉质量主观问卷调查。结果:术后3mo,3mm瞳孔直径下,两组总高阶像差、球差、彗差及三叶草差无差异(均 P >0.05);5mm瞳孔直径下,两组总高阶像差、彗差、三叶草差无差异(均 P >0.05),但球差有差异( P <0.05);7mm瞳孔直径下,两组总高阶像差、球差均有差异(均 P <0.05),但彗差、三叶草差无差异(均 P >0.05)。两组的OSDI问卷评分及OQASⅡ客观视觉质量各项参数均无差异(均 P >0.05)。结论:6.5mm光学区直径FS-LASIK术后暗环境的高阶像差较小,但术前设置6.0mm光学区直径或6.5mm光学区直径均能获得良好的主观及客观视觉质量。展开更多
目的:评价VisuMax飞秒激光与Moria One Use-Plus SBK角膜板层刀制作超薄角膜瓣的舒适性与安全性。方法:回顾性病例系列研究。统计同期接受角膜屈光手术的778例1556眼(VisuMax飞秒激光组即A组384例768眼,SBK角膜板层刀组即B组394例788眼)...目的:评价VisuMax飞秒激光与Moria One Use-Plus SBK角膜板层刀制作超薄角膜瓣的舒适性与安全性。方法:回顾性病例系列研究。统计同期接受角膜屈光手术的778例1556眼(VisuMax飞秒激光组即A组384例768眼,SBK角膜板层刀组即B组394例788眼),对比术中舒适度评分、角膜瓣相关并发症、角膜瓣切口出血、球结膜下出血的发生率,评价两种方法的舒适性与安全性。结果:术中舒适度方面,感觉极不舒适,难以忍受者A组5例(1.3%),B组28例(7.1%);术中角膜瓣切口出血A组4眼(0.5%),B组74眼(9.4%);球结膜下出血A组18眼(2.3%),B组82眼(10.4%);角膜瓣边缘不齐A组0眼(0),B组94(11.9%);A组有4眼(0.5%)出现角膜瓣上皮部分剥脱,但未影响成功掀瓣及手术,A组有53眼(6.9%)发生角膜层间气泡(OBL)。两组无其它相关并发症。结论:两种方法安全可靠,均无严重影响术后视觉质量的角膜瓣相关并发症。展开更多
基金Supported by Natural Science Foundation of Shanghai,China (09ZR1425400)Foundation of Sight-restoring Centre of Shanghai,China (050802)
文摘Objective To assess the time course of Q value after myopic laser-assisted in situ keratomileusis(LASIK) and preliminarily evaluate the determinants of the difference of Q value between before and after LASIK.Methods We performed a retrospective,longitudinal investigation on patients undergoing wavefront optimized LASIK therapy for emmetropization.A total of 418 eyes from 222 cases were examined preoperatively,and partly followed up at one week(172 eyes),one month(134 eyes) and three months(51 eyes) after surgery.The horizontal,vertical and total Q values of cornea were calculated from eccentricity measured at the central 6-mm corneal zones respectively.Potential determinants of the change of Q value were analyzed using multiple linear regressions.Results The mean Q value was-0.17±0.13 preoperatively,and 0.99±0.70,0.97±0.66,and 0.86±0.41 one week,one and three months postoperatively,respectively.One way analysis of variance(ANOVA) demonstrated significant differences between measurements made before surgery and at all postoperative times(at one week,one and three months;all P<0.0001,Bonferroni post hoc),but no significant differences were found among postoperative groups.Significant differences of Q values between horizontal and vertical meridians were found before surgery and at all postoperative times(all P<0.0001).Multiple regression analysis revealed that change of Q value significantly correlated with manifest refraction spherical equivalent(r=0.116,P<0.0001) and axial length(r=0.264,P<0.0001).Conclusions Over the study period,the primary changes in Q value occur within 1 week after surgery,and then become slightly decreased and nearly stable.Manifest refraction spherical equivalent and axial length play a significant role in the change of postoperative Q value.
文摘目的:探讨FS-LASIK设置6.0mm和6.5mm两种光学区直径对术后视觉质量的影响。方法:本研究为前瞻性研究。选取行FS-LASIK手术的患者25例50眼,随机预设置患者双眼光学区切削直径6.0mm或6.5mm,并按光学区直径分为6.0mm及6.5mm两组。术后3mo对两组患者进行Sirius三维眼前节分析系统测量角膜高阶像差(包括3、5、7mm瞳孔直径下的总高阶像差、球差、彗差及三叶草差)以及OQASⅡ视觉质量分析仪比较MTF截止空间频率(MTF cut off)、斯特列尔比值(SR)和客观散射指数(OSI)、不同模拟对比度视力(OV100%、OV20%、OV9%),并对两组患者进行OSDI干眼相关视觉质量主观问卷调查。结果:术后3mo,3mm瞳孔直径下,两组总高阶像差、球差、彗差及三叶草差无差异(均 P >0.05);5mm瞳孔直径下,两组总高阶像差、彗差、三叶草差无差异(均 P >0.05),但球差有差异( P <0.05);7mm瞳孔直径下,两组总高阶像差、球差均有差异(均 P <0.05),但彗差、三叶草差无差异(均 P >0.05)。两组的OSDI问卷评分及OQASⅡ客观视觉质量各项参数均无差异(均 P >0.05)。结论:6.5mm光学区直径FS-LASIK术后暗环境的高阶像差较小,但术前设置6.0mm光学区直径或6.5mm光学区直径均能获得良好的主观及客观视觉质量。
文摘目的:评价VisuMax飞秒激光与Moria One Use-Plus SBK角膜板层刀制作超薄角膜瓣的舒适性与安全性。方法:回顾性病例系列研究。统计同期接受角膜屈光手术的778例1556眼(VisuMax飞秒激光组即A组384例768眼,SBK角膜板层刀组即B组394例788眼),对比术中舒适度评分、角膜瓣相关并发症、角膜瓣切口出血、球结膜下出血的发生率,评价两种方法的舒适性与安全性。结果:术中舒适度方面,感觉极不舒适,难以忍受者A组5例(1.3%),B组28例(7.1%);术中角膜瓣切口出血A组4眼(0.5%),B组74眼(9.4%);球结膜下出血A组18眼(2.3%),B组82眼(10.4%);角膜瓣边缘不齐A组0眼(0),B组94(11.9%);A组有4眼(0.5%)出现角膜瓣上皮部分剥脱,但未影响成功掀瓣及手术,A组有53眼(6.9%)发生角膜层间气泡(OBL)。两组无其它相关并发症。结论:两种方法安全可靠,均无严重影响术后视觉质量的角膜瓣相关并发症。
