简介:AIM:Toassessthequantitativeassociationbetweenanisometropiamagnitude(AM)andthelossesofresolutionandcontrastsensitivity;andtoexemplifyhowthefunctionoffusionandstereopsisvarywithAMinpreviouslyuntreatedanisometropicamblyopia.METHODS:Atotalof57patientswithpreviouslyuntreatedanisometropicamblyopiawithoutstrabismus(range:8-35years),weremeasuredrefractiveerror,bestcorrectedvisualacuity(BCVA),fusionandstereopsis,and48patientshavecompletedcontrastsensitivityfunctiontest.AMwasdeterminedbydioptricvectoradditionmodel,andtheamblyopiadepthwasdeterminedbythedifferenceofBCVAinlogMARunitsbetweentheamblyopicandfelloweyes.RESULTS:AMwassignificantlycorrelatedwithbothamblyopiadepth(PearsonR=0.728,P<0.001)andtheinter-oculardifferenceoftheareaunderthelogcontrastsensitivityfunction(AULCSF)(R=0.505,P<0.001).Depthofamblyopiaandtheinter-oculardifferenceofAULCSFwasalsosignificantlycorrelated(R=0.761,P<0.001).Themoreseverityofamblyopia,thepoorerlevelsofcontrastsensitivity.MostpureanisometropeswithAMwaslessthan3.0Dretainfusionandsomestereopsis,butwhenAMweremorethan3.0D,especiallyfortheanisometropeswhoseAMwasmorethan6.0D,fusionandstereopsisfunctionwereseriouslyimpaired.CONCLUSION:Inthepatientswithpreviouslyuntreatedanisometropicamblyopia,higherdegreeofanisometropiaissignificantlyassociatedwithdeeperamblyopia,worsecontrastsensitivity,fusionandstereopsisfunctions.
简介:目的:探讨高度近视黄斑病变的光学相干断层扫描(OCT)和眼底荧光血管造影(FFA)的形态学特征、分类和对比分析。方法:对入选的高度近视黄斑病变患者61例101眼均行标准对数视力表检查,验光确定屈光度及最佳矫正视力(BCVA),并用IOL-Master测量眼轴长度。入选者需在同一天内行散瞳眼底检查、OCT及FFA检查,必要时行眼底联合造影(FFA&ICGA)。分析不同类型的OCT及FFA形态学特征之间的相互联系,并探讨其与屈光度、最佳矫正视力、眼轴长度及中心凹厚度之间的关系。结果:FFA分类的漆样裂纹型在OCT分类的1型中所占比例为57.14%,显著高于新生血管型和黄斑萎缩型(21.43%),差异有统计学意义(P<0.05)。FFA分类的黄斑萎缩型在OCT分类的2型中所占的比例为67.80%,显著高于漆样裂纹型(18.64%)和新生血管型(13.56%),差异有统计学意义(P<0.05)。OCT3型均属于FFA分类的黄斑萎缩型。OCT1型的屈光度、眼轴长度明显低于2型和3型,而最佳矫正视力和中心凹厚度则明显高于2型和3型。FFA的漆样裂纹型与新生血管型在屈光度及眼轴长度上虽无明显差异,但后者的BCVA及中心凹厚度显著低于前者(P<0.05)。漆样裂纹型及新生血管型的屈光度、眼轴长度均显著低于黄斑萎缩型,最佳矫正视力则明显高于黄斑萎缩型(P<0.05)。结论:高度近视黄斑病变的OCT和FFA形态学特征密切相关,结合OCT和FFA的图像特征对高度近视黄斑病变形态学改变进行对比分析,不仅有助于明确病变的性质,提高我们对疾病发病机制及预后转归的认识,更为临床诊疗提供了有力的支持。
简介:AIM:Toassesstheeffectofmyopiaonthethicknessofretinalnervefiberlayer(RNFL)measuredby3Dopticalcoherencetomography(3D-OCT)inagroupofnonglaucomatousChinesesubjects.METHODS:Twohundredandfifty-eighteyesof258healthyChinesemyopicindividualswererecruitedandfourgroupswereclassifiedaccordingtotheirsphericalequivalent(SE):lowmyopia(n=42,-0.50
简介:AIM:ToinvestigatetheregulationofEaf2proteininmouselenscellsapoptosisinducedbyultraviolet(UV)radiation.METHODS:AneyeofEaf2geneknockoutmiceornormalcontrolmicewasexposedtoUVradiation,andtheotheronewasnon-exposed.AlloflenseswereanalyzedbyTUNELandcaspase3activityassaystodeterminethedifferenceoftheapoptosisinducedbyUVradiation.Inaddition,exposedandnon-exposedlenseswereanalyzedbyquantifiedp53expressionandreal-timereversetranscription-polymerasechainreaction(RT-PCR)ofBax,Bid,Apaf-1,PumaandNoxa,tocompareEaf2geneknockoutmiceandnormalcontrolmice.RESULTS:UVradiationcausedapoptosisoflenscellsinnormalcontrolmiceandEaf2knockoutmice.Activityofcaspase3wassignificantlyhigherinnormalcontrolmicethanEaf2knockoutmice.Expressionofp53proteinwassignificantlyhigherinlensesexposedtoUVradiationthannonexposedlenses,butwassimilarbetweenEaf2geneknockoutmiceandnormalcontrolmiceinthesameUVcondition.AfterexposingtoUVradiation,theanalysisofreal-timeRT-PCRdemonstratedthatmRNAlevelsofPumaandNoxaweresignificantlyhigherinlensesofnormalcontrolmicethanEaf2geneknockoutmice,andthatmRNAlevelsofBax,BidandApaf-1werenotsignificantlydifferentbetweengeneknockoutmiceandnormalcontrolmice.CONCLUSION:Eaf2increaseslenscellsapoptosisinducedbyultravioletradiation.AndEaf2up-regulatesexpressionofthePumaandtheNoxatoactonlenscellsapoptosisafterUVradiation.
简介:目的:探讨继发性角膜溃疡的临床治疗方案。方法:回顾性分析我院2006-12/2008-12临床诊断为"继发性角膜溃疡"的患者8例8眼,其中4例选择结膜瓣遮盖术,3例行部分板层角膜移植术(lamellarkeratoplasty,LKP),1例因角膜穿孔行穿透性角膜移植术(penetratingkeratoplasty,PKP)。术后随访4-10(平均6)mo,观察视力、溃疡愈合及复发情况、角膜植片和植床情况。结果:行结膜瓣遮盖术者溃疡均治愈;行部分LKP术者植片透明,植床残留薄层瘢痕,行PKP术者植片透明,两者视力均有所提高。所有病例溃疡未见复发。结论:对于继发性角膜溃疡,应该根据不同病例的特点采取个体化的手术方式治疗,从而获得比较满意的临床疗效。
简介:目的探讨外耳道解剖的CT影像毗邻关系。方法在PACS系统中调取2011~2013年来本院行中耳螺旋CT检查且耳道周围主要观测结构清晰者327例(654耳)的轴位片,在东软neusoft软件中,将图像放大后,在耳道中部断层片中测量鼓沟至面神经垂直部距离及毗邻颞颌关节的耳道前壁厚度。结果鼓沟到面神经垂直部约为4mm,侧别差异有统计学意义(P〈0.05),性别间差异无统计学意义(P〉0.05);耳道前壁厚度约1.5mm,侧别差异有统计学意义(P〈0.05),性别间差异有统计学意义(P〈0.05)。结论螺旋CT可以良好显示耳道周围主要结构的毗邻关系,为耳道成形及耳道入路镫骨手术提供实用参数。
简介:·Descemet’smembranedetachment(DMD)canbeapotentiallyseriouscomplicationofintraocularsurgeryoroculartrauma.Thecauseisnotveryclear.WearetryingtoremindanawarenessofthespectrumofDMDresultingfromtrabeculectomybypresentingacaseofextensiveDMDaftertrabeculectomywhichwassuccessfullyrepaired.
简介:目的:探讨在后节手术中合并前节疾病(白内障、青光眼、角膜病)联合手术的利与弊,并分析影响手术效果的危险因素。方法:有针对性的分为A组增殖性糖尿病视网膜病变(proliferativediabeticretinopathy,PDR),B组复杂性视网膜脱离(retinaldetachment,RI)),为了便于对比,又将A组分为A,组:单纯玻璃体切割组;A:组:玻璃体切割+白内障摘除组;A,组:玻璃体切割+白内障摘除+人工晶状体植入术组。将B组分为B,组:单纯玻璃体切割组;B2组:玻璃体切割+白内障摘除组;B组:玻璃体切割+白内障摘除+人工晶状体植入术组。结果:手术的并发症为主要观察指标,A组为新生血管性青光眼,B组为手术复发或更严重的PVR形成。其并发症的发生率A3〉A2〉A1,A3明显高于A2和A1,均有统计学意义,A2〉A1,但无统计学意义。B组三组的结果与A组三组相同。结论:可能的情况下尽量不选择联合手术,如影响操作则选择非一期植入人工晶状体。