目的比较两种不同设计的一片式非球面人工晶状体（intraocular lens，IOL）植入后1个月和3个月的倾斜和偏心及全眼和眼内高阶像差成分、不同空间频率下的调制传递函数（modulation transfer function，MTF），指导临床两种非球面IOL选...目的比较两种不同设计的一片式非球面人工晶状体（intraocular lens，IOL）植入后1个月和3个月的倾斜和偏心及全眼和眼内高阶像差成分、不同空间频率下的调制传递函数（modulation transfer function，MTF），指导临床两种非球面IOL选择。方法临床病例对照研究。选取2013年3～5月在天津市眼科医院行白内障超声乳化联合IOL植入术的单纯性老年性自内障患者80只眼，根据角膜球差，40只眼植入Tecnis ZCB00 IOL（眼力健公司）；另40只眼植入ADAPT-AOIOL（博士伦公司），分别于术后1个月和3个月行iTrace视觉功能分析仪和Pentacam眼前段分析仪检查。记录6ram瞳孔下两种IOL的全眼及眼内高阶像差成分及MTF值，采用Image-pro plus图像分析软件计算出IOL的偏心值和倾斜度。组间采用独立样本f检验、组内采用配对f检验进行分析比较，各组倾斜度和偏心值行Pearson相关分析。结果2组术后1个月和3个月倾斜和偏心均无相关性差异无统计学意义（P〉0．05）。在倾斜和偏心上，术后1个月和3个月，2组组内及组间比较差异均无统计学意义（P〉0．05）。术后1个月和3个月，在全眼及眼内总高阶像差、彗差和球差上，2组组内比较差异无统计学意义（P〉0．05），但2组相比在全眼及眼内总高阶像差和球差上差异有统计学意义（P值分别为0．005，0．012，0．000，0．000，0．023，0．041，0．014，0．002），P〈0．05；但在眼内彗差上2组比较差异无统计学意义（P〉0．05）。在MTF上术后1个月和3个月，两组组内及组间比较差异无统计学意义（P〉0．05）。结论AO与ZCB00两种不同设计的一片式非球面IOL术后1个月和3个月均表现出良好的稳定性和居中性，在视觉质量上，ZCB00定程度上优于AO，但长远效果仍需进一步观察。展开更多
Background:To evaluate efficacy and safety of combined pars plana vitrectomy(PPV)and scleral fixated intraocular lens(SFIOL)surgery as a single procedure.Methods:Retrospective interventional case series done at a tert...Background:To evaluate efficacy and safety of combined pars plana vitrectomy(PPV)and scleral fixated intraocular lens(SFIOL)surgery as a single procedure.Methods:Retrospective interventional case series done at a tertiary eye care center in Northern India.Eleven patients who underwent combined PPV and SFIOL surgery were included and analyzed retrospectively.Results:Mean age of the patients was 43.36±15.12 years(range,22-64 years).Eight were male.Mean baseline best corrected visual acuity(BCVA)was 0.78±0.63 logMAR units while the mean post-operative BCVA at 6 months follow-up was 0.37±0.29 logMAR units,the visual gain being statistically significant(P=0.021).None of the patients had a drop in BCVA with nine patients having final BCVA better than 0.48 logMAR units.Choroidal detachment(CD)was the only notable complication,seen in three patients.Other complications included two cases of intraoperative retinal breaks,a case each of reversible corneal edema,ocular hypertension and cystoid macular edema.Conclusions:Combined PPV and SFIOL is an efficacious procedure for managing IOL/lens dislocation and aphakia in a single surgery.There may be short-term reversible complications with no impact on final visual gain.展开更多
Cataract surgery is the most performed surgery in ophthalmology and remains as the ultimate refractive surgery.It offers an opportunity to improve a patient’s visual acuity and target a degree of spectacle independen...Cataract surgery is the most performed surgery in ophthalmology and remains as the ultimate refractive surgery.It offers an opportunity to improve a patient’s visual acuity and target a degree of spectacle independence.The process of intraocular lens(IOL)calculations serves as a crucial element in achieving successful post-operative refractive outcomes.A modern-day surgeon has access to several IOL formulas to pick the most appropriate lens to achieve a desired target refraction.These formulas,however,have both advantages and limitations and therefore reach within 0.50 diopters of the target refraction only 70-80%of the time.There is a lack of a single,ideal formula that can simplify complexities of this process and achieve higher degrees of accuracy.The development of the IOL Ladas‘super formula’may provide a simplistic,accurate,and ever-evolving solution to improving outcomes.展开更多
文摘Background:To evaluate efficacy and safety of combined pars plana vitrectomy(PPV)and scleral fixated intraocular lens(SFIOL)surgery as a single procedure.Methods:Retrospective interventional case series done at a tertiary eye care center in Northern India.Eleven patients who underwent combined PPV and SFIOL surgery were included and analyzed retrospectively.Results:Mean age of the patients was 43.36±15.12 years(range,22-64 years).Eight were male.Mean baseline best corrected visual acuity(BCVA)was 0.78±0.63 logMAR units while the mean post-operative BCVA at 6 months follow-up was 0.37±0.29 logMAR units,the visual gain being statistically significant(P=0.021).None of the patients had a drop in BCVA with nine patients having final BCVA better than 0.48 logMAR units.Choroidal detachment(CD)was the only notable complication,seen in three patients.Other complications included two cases of intraoperative retinal breaks,a case each of reversible corneal edema,ocular hypertension and cystoid macular edema.Conclusions:Combined PPV and SFIOL is an efficacious procedure for managing IOL/lens dislocation and aphakia in a single surgery.There may be short-term reversible complications with no impact on final visual gain.
文摘Cataract surgery is the most performed surgery in ophthalmology and remains as the ultimate refractive surgery.It offers an opportunity to improve a patient’s visual acuity and target a degree of spectacle independence.The process of intraocular lens(IOL)calculations serves as a crucial element in achieving successful post-operative refractive outcomes.A modern-day surgeon has access to several IOL formulas to pick the most appropriate lens to achieve a desired target refraction.These formulas,however,have both advantages and limitations and therefore reach within 0.50 diopters of the target refraction only 70-80%of the time.There is a lack of a single,ideal formula that can simplify complexities of this process and achieve higher degrees of accuracy.The development of the IOL Ladas‘super formula’may provide a simplistic,accurate,and ever-evolving solution to improving outcomes.
