简介：AIM:Toassesstheeffectofmyopiaonthethicknessofretinalnervefiberlayer(RNFL)measuredby3Dopticalcoherencetomography(3D-OCT)inagroupofnonglaucomatousChinesesubjects.METHODS:Twohundredandfifty-eighteyesof258healthyChinesemyopicindividualswererecruitedandfourgroupswereclassifiedaccordingtotheirsphericalequivalent(SE):lowmyopia(n=42,-0.50

简介：AIM:Totestthehypothesisthatamblyopicneuroretinamayhaveanalteredthicknesswhencomparedtothenormal.·METHODS:Twenty-fiveamblyopic,youngpatientsbetweentheagesof7and11yearsoldwerestudied.Theinterestedneuroretinaareasaredefinedinto10sub-regionsaccordingtosuperior-inferior,nasal-temoral,andperi-paraaxis,whichcrossthefovelastructure.Thethicknessesoften,definedmacularregionswereseparatelymeasuredbyopticalcoherencetomography(OCT)andanalyzedbyt-test.·RESULTS:Theaveragethicknessofneuroretinaintheexactfoveolaoftheamblyopiceyesislargerthanthatofnormaleyes(P<0.05),buttheothernineregionshavenosignificantdifference.Interestingly,inboththenormalandamblyopiceyes,thetemporalarealooksthinnerthanotherquadrants(P<0.05).·CONCLUSION:Thicknessalterationmaybeassociatedwithamblyopicdisordersinyoungpatients.Studyingalargervolumeofsubjectsofsimilarageisrequiredtoconfirmthisobservation.

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：目的：比较前节OCT与A超测量中央前房深度的差异,以评价前节OCT在眼前节参数测量中的准确性。方法：对白内障患者25例（26眼）使用前节OCT通过眼球瞳孔中心分别进行45度、90度、135度、180度方向扫描前房深度,每个方向连续测量3次,并且不对眼球施加任何外力。再用A超通过瞳孔中央连续测量前房深度5次。结果：前节OCT测量中央前房深度与A超测量结果两者有显著性差异;两者测量的稳定性相差明显,其中,前节OCT标准差（s）平均值0.02619mm;A超的标准差（s）平均值0.20773mm。结论：前节OCT测量中央前房深度与A超测量结果存在一定差异,前节OCT测量结果波动度、重复性优于A超。

简介：目的:应用视网膜厚度分析仪(RTA)对青少年正常眼黄斑区视网膜厚度进行测定,以确定国人参考值范围及正常地形图的特点.方法:对100眼经眼科检查确认的正常眼按同一方法进行黄斑区RTA图像采集,使用随机软件对其厚度进行测量,并按照青少年黄斑地形图特点,人工测量不同黄斑分区距中心小凹的跨度,计算黄斑不同分区的范围及视网膜厚度的平均值.对结果应用多元回归方法探讨年龄、性别、眼别对视网膜厚度的影响.结果:黄斑区可分为中心小凹区、中心凹区、旁中心凹区,中心小凹直径为428±165μm,中心凹平均直径为1356±277μm,旁中心区平均直径为1450±226μm;黄斑部视网膜平均厚度168±14.3μm,黄斑各部位测量所得数值为:中心小凹区为128±22μm,中心凹区为138±17.6μm,旁中心凹区为169±15μm,不同分区视网膜厚度有明显差异(P＜0.05),年龄对中心凹区和中心小凹区平均厚度影响最大(P＜0.05);不同性别、眼别对视网膜厚度无影响(P＞0.05).我国青少年不同分区视网膜平均厚度低于RTA软件的正常参考值,差异有显著性(P＜0.01).结论:RTA能够对活体视网膜厚度进行精确的量化测定,青少年黄斑区厚度测定值可作为我国正常青少年人群黄斑视网膜厚度的正常值参考.

简介：目的研究非接触式角膜内皮镜中参与分析的细胞数（NC）对测量结果重复性的影响。方法收集2011年3月至2016年3月到我院诊治并在同一时间行2次以上（含2次）非接触式角膜内皮镜测量的患者,其测量结果包括中央角膜厚度（CCT）、内皮细胞密度（ECD）、平均细胞面积（ACS）、细胞面积变异系数（CV）和六边形细胞百分比（HEX%）,排除NC=0的结果,〉2次测量的患者,选择NC最大的2组结果,以每位患者所得的2组结果中NC较小者（NCmin）为分组依据,10个细胞为一个等级,获得（NCmin〈10、10～20……90～100、≥100）11个组段,采用组内相关系数（ICC）及其95%置信区间（95%CI）对各组段内2组数据的重复性进行评估,并对ICC进行F检验,检验水准α=0.05。结果各组段CCT的ICC均〉0.9,且95%CI下限在0.75以上;ECD和ACS的ICC,当NC≥100时,均〉0.9,且95%CI下限在0.75以上,当NC≥50时,均〉0.75;CV的ICC,当NC≥90时,〉0.75,其余组段均〈0.75;HEX%的ICC,当NC≥100时,〉0.75,其余组段均〈0.75。结论CCT测量结果的重复性不受NC限制;分析ECD和ACS时,NC应在50以上,当NC≥100时,测量结果的重复性最佳;分析CV和HEX%时,NC应分别在90和100以上。

简介：目的比较24h眼压监测中夜间即刻坐位眼压值和坐起休息10min后测得的眼压值，探讨夜间眼压的不同测量方法对青光眼24h眼压昼夜波动的影响。方法对已确诊且未用药、未做过手术的48例正常眼压性青光眼及17例原发性开角型青光眼患者进行24h眼压监测，每2h1次，其中测量夜间0：00、2：00、4．00眼压时，逐个唤起患者后立即测，后嘱患者坐起休息10min再测，采用SPSS软件以配对t检验分析比较测量结果。结果夜间即刻坐位眼压值和坐起休息10rain后测得的眼压值差异有统计学意义（P〈0．001），正常眼压性青光眼与原发性开角型青光眼间眼压差值差异有统计学意义（P〈0．05）。结论即刻坐位眼压值能更准确反映夜间眼压，对24h眼压测量及青光眼诊断及治疗更有价值，值得临床应用。

简介：AIM:Tocomparetheregularityandaccuracyoflaserinsitukeratomileusis(LASIK)flapscreatedbytheZiemerFEMTOLDV'Classic'(Ziemer'Classic')andZiemerFEMTOLDVCrystalLinefemtosecondlaser(ZiemerCrystalLine).METHODS:Fourier-domainopticalcoherencetomography(RTVueOCT)wasusedtomeasurethemorphologyof200LASIKflapsof100consecutivepatientscreatedwiththeZiemerClassic(100flaps)ortheZiemerCrystalLine(100flaps)atoneweekpostoperatively.Flapthicknesswasevaluatedat36specifiedmeasurementpointsoneachflap.Forallprocedureswithbothlasers,thenominalflapthicknesswas110μm.RESULTS:ThemeanflapthicknessoftheZiemerCrystalLinegroup(102.49±2.68μm)wasthinnerthanthatoftheZiemerClassicgroup(107.65±5.09μm)(P<0.01).Averagethicknessofallflapswasuniformwithin4μmatallmeasurementpoints.TheflapsintheZiemerCrystalLinegroupweremoreregularthanthoseintheZiemerClassicgroupwhenmeasuredfromthecentertotheperiphery.Themaximumdeviationfromthenominal110μmof36measurementswas8μmintheZiemerClassicgroup,whileintheZiemerCrystalLinegroupitwas9μm.Withinthe3600measurementsonthe100eyes,differencesgreaterthan20μmwereobserved0.14%intheZiemerClassicgroup,and0.04%intheZiemerCrystalLinegroup.CONCLUSION:TheflapscreatedwiththeZiemerFEMTOLDVCrystalLinefemtosecondlaseraremoreuniformandthinnerthanthosecreatedbytheZiemerFEMTOLDVClassicfemtosecondlaser.

简介：目的：用Tono-Pen眼压计测量人眼角膜中央、旁中央、角巩缘部位眼压值，比较不同部位值的差异及相关性。方法：正常角膜用Tono-Pen眼压计依次测量角膜中心、旁中心、角膜缘眼压值，方差分析不同部位眼压的差异，分析结果的相关性。结果：Tono-Pen眼压计检测得出的眼压平均值角膜中央为16．28±2．73mmHg，旁中央为16．33±2．69mmHg，角巩缘为16．58±2．58mmHg．角膜中心与旁中心的相关系数r=0．966，P=0．000，角膜中心与角膜缘的相关系数为r=0．897．P=0．000，角膜旁中心与角膜缘的相关系数为r=0．910，P=0．000。不同部位眼压值差异没有显著性（F=0．093，P=0．913〉0．05）。结论：不同部位眼压值密切相关，差异没有统计学意义。Tono-Pen眼压计测量不同部位眼压均可取得较为一致的结果。

简介：目的：探索一种临床实用的前房深度相对定量测量法,初步确定老年人前房深度的正常参考值。方法：裂隙灯光源外转45°，受检眼直视裂隙光，在6点时钟方向测量六个点的前房深度（ABCDEF），以角膜缘处的角膜厚度（CT值）为1计。A：角巩膜缘黑白交界处；B：A点上移1CT；C：B点上移1CT；D：虹膜最高点；E：瞳孔缘；F：晶状体前极。测量了50～75岁的正常老年人，229例229眼，采用双盲法对22例44眼进行了11次重复性检测。结果：女性组ABCDEF点的前房深度均值分别为0．38，0．58，0．89，2．10，2．65和3．26CT；男性组分别为0．71，1．02，1．43，2．37，2．90，3．41CT。女性组每个点的深度均比男性浅（P〈0．05），越近周边部越显著。结论：前房深度六点相对定量测量法可重复性好，实用性强。

简介：目的：通过与非接触式眼压计（non-contacttonometer,NCT）的比较,评价Diaton眼压计（DT）在准分子激光原位角膜磨镶术（laserinsitukeratomileusis,LASIK）前后眼压测量中的应用价值。方法：在LASIK术前及术后1mo,分别使用NCT和DT测量患者眼压,使用SPSS13.0统计软件对所得结果进行统计学分析。结果：术后1mo时,NCT眼压测量值较术前下降（5.76±2.31）mmHg,DT眼压测量值则无显著差异（t=0.70,P=0.487）;NCT与DT读数测量值差值与术中切削量呈正相关,与术后中央角膜厚度呈负相关。结论：Diaton测量眼压不受角膜厚度的影响,因此更适用于LASIK术后患者的眼压测量。

简介：AIM:TotrainTibetanmonkey(Macacathibetana)forintraocularpressure(IOP)measurementinconsciousstateandobtainnormalIOPinconsciousTibetanMacaque.·METHODS:Thetrainingwasbasedonaward-conditionedbehavior.Foodstimulationandhuman-animalinteractionwereusedinthistraining.·RESULTS:TrainedTibetanmonkeyscalmlyacceptedIOPmeasurementbytheTonoVet?誖reboundtonometerwithoutsedationoranesthesiaandtheirIOPvaluesweresimilartootherprimates.·CONCLUSION:Human-cultivatedThibetanmonkeysaretamable,andcanbeusedforbiomedicalresearchsuchasophthalmicresearchwithoutanesthesia.

简介：分泌性中耳炎临床多见,虽经反复咽鼓管吹张、鼓膜置管等治疗,仍有复发的顽固病例。本研究发现分泌性中耳炎患者其咽鼓管鼓口直径较正常狭小,提示可能与难治性分泌性中耳炎存在一定关系。本研究结果在顽固性分泌性中耳炎中没有发现咽鼓管骨性段骨质增生现象。

简介：AIM:Tofindouttheoutcomeoflaserphotocoagulationinclinicallysignificantmacularedema(CSME)byopticalcoherencetomography(OCT).·METHODS:Itwasaprospective,non-controlled,caseseriesstudyenrolling81eyesof64patientswithCSMEbetweenAugust2008andJanuary2010.AllpatientsreceivedmodifiedgridphotocoagulationwithfrequencydoubledNd:YAGlaser.Eachpatientwasevaluatedintermsofbest-correctedvisualacuity(BCVA)andregressionorprogressionofmaculopathyafterlasertherapyat1,3and6months.Spearman’scorrelationtestwasusedtoshowthecorrelationbetweenBCVAandtotalmacularvolume(TMV).Analysisofvariance(ANOVA)wasusedtocompareamonggroupsandindependentt-testwasusedtocompareineachgroup.·RESULTS:ThereishighcorrelationbetweenBCVAandTMV(P≤0.001).BCVAimprovedin50.6%,remainedstaticin39.5%anddeterioratedin9.9%patientsafter6monthoftreatment.TheBaselineTMV(meanandSD)were9.26±1.83,10.4±2.38,11.5±3.05,8.89±0.75and9.47±1.98mm3fordifferentOCTpatterns,ST(spongelikethickening),CMO(cystoidmacularedema),SFD(subfovealdetachment),VMIA(Vitreomacularinterfaceabnormality)andaverageTMVrespectively(P=0.04).After6monthsoflasertreatment,themeanTMVdecreasedfrom9.47±1.98mm3to8.77±1.31mm3(P=0.01).InSTtherewassignificantdecreaseinTMV,P=0.01,Furtherwithinthesegroupsat6months,theyweresignificantlydifferent,P=0.01.·CONCLUSION:OCTshowedthedifferentmorphologicalvariantofCSMEwhiletheresponseoftreatmentisdifferent.TMVdecreasedthemostandhenceshowedtheimprovementinvisionafter6monthsoflasertreatment.IntheeraofAntivascularendothelialgrowthfactors(VEGFs),efficacyoflaserseemstobeinshadowbutitisstillfirstlineoftreatmentindevelopingnationlikeNepalwhereantiVEGFsmaynotbeeasilyavailableandaffordable.

简介：AIM:Tomeasurecentralcornealthickness(CCT)andpre-cornealtearfilmthicknessusingtheGalileidualScheimpfluganalyzer(GSA)inNewZealandWhiterabbits.METHODS:TennormalNewZealandWhiterabbits(20eyes)wereincludedinthisstudy.Withtheassistanceof0.1%fluorescein,thepre-cornealtearfilmcanbewellvisualized.BotheyesofeachrabbitwerescannedoncewiththeGSApre-andpost-instillationof1μL0.1%fluorescein.ThedifferencebetweenthetwomeasurementsofCCT(4-mmdiameter)wasrecordedasthepachymetricvaluesofthecentraltearfilm.RESULTS:TheCCTofpre-andpost-instillationwas388.8±9.5μmand407.0±10.5μm,respectively.Afterapairedt-testanalysis,thecentralpre-cornealtearfilmthicknessof4mmdiameterwas18.2±5.31μmwitha95%confidenceintervalof(15.7,20.6)μm(P<0.001).CONCLUSION:GSAcanbeusedtomeasureCCTandanalyzecentraltearfilmthicknessofrabbitswiththehelpoffluorescein.

简介：AIM:Toinvestigatetheaccuracyofintraocularpressure(IOP)asmeasuredbyaReichertOcularResponseAnalyzer(ORA),aswellastherelationshipbetweencentralcornealthickness(CCT)andIOPasmeasuredbyORA,Goldmannapplanationtonometry(GAT),anddynamiccontourtonometry(DCT).·METHODS:Atotalof158healthyindividuals(296eyes)werechosenrandomlyformeasurementofIOP.AfterCCTwasmeasuredusingA-ultrasound(A-US),IOPwasmeasuredbyORA,GAT,andDCTdevicesinarandomizedorder.TheIOPvaluesacquiredusingeachofthethreetonometrieswerecompared,andtherelationshipbetweenCCTandIOPvalueswereanalyzedseparately.TwoIOPvalues,Goldmann-correlatedIOPvalue(IOPg)andcorneal-compensatedintraocularpressure(IOPcc),weregotusingORA.ThreegroupsweredefinedaccordingtoCCT:1)thincornea(CCT<520μm);2)normal-thicknesscornea(CCT:520-580μm);and3)thickcornea(CCT>580μm)groups.·RESULTS:Innormalsubjects,IOPmeasurementswere14.95±2.99mmHgwithORA(IOPg),15.21±2.77mmHgwithORA(IOPcc),15.22±2.77mmHgwithGAT,and15.49±2.56mmHgwithDCT.Meandifferenceswere0.01±2.29mmHgbetweenIOPccandGAT(P>0.05)and0.28±2.20mmHgbetweenIOPccandDC(P>0.05).TherewasagreatercorrelationbetweenIOPccandDCT(r=0.946,P=0.000)thanthatbetweenIOPccandGAT(r=0.845,P=0.000).DCThadasignificantcorrelationwithGAT(r=0.854,P=0.000).GATwasmoderatelycorrelatedwithCCT(r=0.296,P<0.001),whileIOPccshowedaweakbutsignificantcorrelationwithCCT(r=0.155,P=0.007).TherewasastrongnegativecorrelationbetweenCCTandthedifferencebetweenIOPccandGAT(r=-0.803,P=0.000),withevery10increaseinCCTresultinginanincreaseinthisdifferenceof0.35mmHg.Thethickcorneagroup(CCT>580μm)showedtheleastsignificantcorrelationbetweenIOPccandGAT(r=0.859,P=0.000);whilethethincorneagroup(CCT<520μm)hadthemostsignificantcorrelationbetweenIOPccandGAT(r=0.926,P=0.000).ThecorrelateddifferencesbetweenIOPccan