简介:AIM:Todescribethecharacteristicsofmodulationtransferfunction(MTF)ofanteriorcornealsurface,andobtainthethenormalreferencerangeofMTFatdifferentspatialfrequenciesandopticalzonesoftheanteriorcornealsurfaceinmyopes.·METHODS:Fourhundredeyesfrom200patientswereexaminedunderSIRIUScornealtopographysystem.PhoenisanalysissoftwarewasappliedtosimulatetheMTFcurvesofanteriorcornealsurfaceatverticalandhorizontalmeridiansatthe3,4,5,6,7mmopticalzonesofcornea.TheMTFvaluesatspatialfrequenciesof5,10,15,20,25,30,35,40,45,50,55and60cycles/degree(c/d)wereselected.·RESULTS:TheMTFcurveofanteriorcornealsurfacedecreasedrapidlyfromlowtointermediatefrequency(0-15cpd)atvariousopticalzonesofcornea,thevaluedecreasedto0slowlyathigherfrequency(>15cpd).Withtheincreaseoftheopticalzonesofcornea,MTFcurvedecreasedgradually.3)Intherangeof3mm-6mmopticalzonesofthecornea,theMTFvaluesmeasuredathorizontalmeridianweregreaterthanthecorrespondingvaluesathorizontalmeridianofeachspatialfrequency,thedifferencewasstatisticallysignificant(P<0.05).At7mmopticalzonesofcornea,theMTFvaluesmeasuredathorizontalmeridianwerelessthanthecorrespondingvaluesatverticalmeridianat10-60spatialfrequencies(cpd),andthedifferencewasstatisticallysignificantin25,30,35,40,45,50cpd(P<0.05).·CONCLUSION:MTFcanbeusedtodescribetheimagingqualityofopticalsystemsatanteriorcornealsurfaceobjectivelyindetail.
简介:<正>DearSir,IamDr.YunLi,fromtheSecondHospitalAffiliatedtoNanchangUniversity,JiangxiProvince,China.IwritetopresentacasereportofIOLimplantationin
简介:目的:探讨眼眶IgG4相关疾病(IgG4-RD)的临床病理特点。方法:收集整理23例35眼眼眶IgG4-RD患者的临床病理资料,对其进行组织学和免疫组织化学观察,总结其临床和病理特点。结果:眼眶IgG4-RD患者23例35眼,其中男8例9眼,女15例26眼,年龄28-72(平均52.1)岁。19例30眼来源于泪腺,4例5眼来源于眶内其他部位。以泪腺区肿胀或眼球突出就诊。单侧11例,双侧12例。病程1mo-10a,平均27mo。1例1眼6mo后复发。大体:灰白色结节状肿物,泪腺表面有很薄的纤维膜包绕。组织学特点:泪腺腺泡、导管组织严重萎缩甚至消失,被大量密集的淋巴细胞、浆细胞及淋巴滤泡替代,伴有不同程度的纤维化。免疫组织化学染色:23例35眼IgG4阳性浆细胞均〉50个/HPF,IgG4/IgG阳性浆细胞比值〉40%。结论:眼眶IgG4-RD主要发生于泪腺组织,通过组织学特点和免疫组织化学IgG4的表达可明确诊断。IgG4-RD应早期筛查、预防和治疗。
简介:AIM:Tocharacterizetheclinicalfeatures,diagnosis,treatmentandprognosisofuveitisassociatedwithankylosingspondylitis(AS)inChinesepatients.·METHODS:TwohundredandthreepatientswithuveitisassociatedwithASfollowed-upintheThirdMilitaryMedicalUniversityDapingHospitalbetween2005and2010wereretrospectivelyevaluatedinthisstudy.Completeophthalmologicalexaminationswereevaluatedatbaselineandduringthefollow-upperiod.Thegender,age,follow-uptime,meanfrequencyofuveitisonset,andaccompanyingeyeexaminationfindings,history,demographicalparameterswerereviewed.Allthepatientspresentedcompleteclinicalandradiologic(sacroiliac,lumbar,dorsalandcervicalspine,knee,ankle,shoulder,hip,elbow)evaluation.HLA-B27typingwasalsosearched.·RESULTS:Therewere203patientsdiagnosedwithASassociateduveitis.AllshowedsacroiliacX-raychangesindicativeofAS.Therewere184maleand19femalepatients.Theaverageageofpatientswas35±12(range18-50).Meanfollow-upperiodwas2.4years(1-5years).Acuteanterioruveitiswasthemostcommontypeofuveitisinbothgenders.121eyespresentedunilateralinvolvement(55.2%),and92eyespresentedbilateralinvolvement(45.3%)withonsetalternately.22eyesoccurredhypopyon,16eyeswerefoundanteriorvitreouscells,7eyeswerenotedreactivemacularedemaorexudation,29eyespresentedposteriorsynechiaeofiris,and14eyespresentedcataract,9eyespresentedsecondaryglaucoma,2eyespresentedbendcornealdegenerationand1eyespresentedatrophyofeyeball.Atthefinalvisit,uveitiswaswellcontrolledinmostpatients.·CONCLUSION:ASassociatedwithuveitisinChinesepatientsmainlymanifestsasacuteanterioruveitis.AcombinationofcorticosteroidswithothermydriasisagentsiseffectiveformostASassociatedwithuveitispatients.Ingeneral,theprognosisisgoodinthesecases.
简介:目的:评价Densiron68硅油作为眼内充填物的有效性及安全性。方法:回顾性分析2015-01/2016-01我院眼科因复杂视网膜脱离接受重硅油充填术的患者30例30眼。观察分析术前及术后的最佳矫正视力(BCVA)、眼压、视网膜复位情况及术后并发症等。结果:术前与硅油充填术后BCVA的差异,术前与取硅油术后3moBCVA的差异均有统计学意义(z=-2.198,P=0.028;z=-2.682,P=0.007)。平均术前眼压为16.067±4.025mmHg,硅油充填术后为20.233±8.007mmHg,差异有统计学意义(t=-2.913,P=0.005);而硅油取出术后眼压14.933±3.423mmHg,与术前眼压比较差异无统计学意义(t=2.635,P=0.430)。重硅油取出术后视网膜复位率90%,常见并发症为硅油乳化、并发性白内障。结论:重硅油Densiron68作为眼内充填物治疗复杂性玻璃体视网膜疾病有效及安全,但由于重硅油乳化率较高、术后易并发白内障,因此临床使用时应严格掌握适应证。
简介:青光眼是全球第二大致盲性眼病,全球有近4亿青光眼患者,我国青光眼的患病率约为1.3%,居世界第二位,约有2300万青光眼患者。临床上青光眼导致的失明占整个眼科致盲的25%-40%,是世界上第一位不可逆性致盲性眼病。目前为止,人类尚无一种有效治疗手段能够治愈这一疾病。患者一旦出现视力下降、视物模糊、眼红眼痛等症状就需要及时就医,青光眼对视力的损害是不可逆转的,最终可能导致失明。青光眼的病理基础是眼压升高,眼压的调节功能会受到影响,视物模糊会使患者以为自己只是看花眼了。患者往往通过眼部不适症状判断自己是否患有青光眼,这是一种非常主观的判断方法。那么青光眼有哪些症状呢?
简介:目的:探讨硅油和重硅油两种眼内填充物对兔眼视网膜电生理的中长期影响。方法:选用标准家兔28只,右眼为术眼,随机分成3组,A组12只,B组12只,C组4只。A组:玻璃体切割联合玻璃体腔填充硅油组;B组:玻璃体切割联合玻璃体腔填充重硅油组;C组:玻璃体切割联合玻璃体腔填充平衡盐溶液组。对实验动物术眼术前与术后不同时间段测得的视网膜后极部厚度、眼压及视网膜电图b波振幅值进行统计分析。结果:实验A、B组及对照C组术前及术后不同时间点测得的术眼眼压经过两两比较,无统计学差异(P〉0.05);A、B、C组经两两比较,在术后第24wk时经OCT测得的术眼视网膜后极部厚度值均有统计学差异(P〈0.05);在术后第24wk时术眼ERG的b波振幅均值有显著统计学差异(P〈0.01)。结论:硅油或者重硅油在作为玻璃体腔内填充物后,对兔眼术后眼压中长期内的影响无明显差别;重硅油在填充后对兔眼视网膜视觉信息传导功能的负面影响,导致视网膜变薄的程度要明显大于普通硅油。
简介:AIM:ToidentifythegeneticdefectinaChinesefamilywithbilateralprogressivechildhoodposteriorcataract.METHODS:Atwo-generationfamilywasrecruitedinthisstudy.Familyhistoryandclinicaldatawererecorded.AllreportedcandidategenesassociatedwithcongenitalposteriorcataractwerescreenedbydirectDNAsequencing.·RESULTS:Allaffectedindividualspresentedposterioropacitiesinthelens.Directsequencingofthecandidategenesshowedaheterozygousc.2668C>TvariationinEPHA2gene,whichresultedinthereplacementofargininebycysteineatcodon890(p.R890C).Thismutationwasfoundintwoaffectedindividuals,butwasnotobservedin200normalcontrols.·CONCLUSION:Wereportanovelmutation(p.R890C)intheEPHA2receptortyrosinekinasegene.ThefindingexpandsthemutationspectrumofEPHA2inassociationwithposteriorcataract.
简介:目的:探讨线粒体膜电位(△ψm)、Caspase3在As2O3诱导ACC-2细胞凋亡中的作用。方法:进行ACC-2细胞培养,将As2O3建立不同药物浓度梯度(0,1.0,2.0,4.0,8.0μmol/L)分别作用于ACC-2细胞,用Rh123染色,流式细胞仪检测8.0μmol/LAs2O3作用前、后(24h),ACC-2细胞的线粒体膜电位(△ψm)变化;用多功能酶标仪进行Caspase3活性检测。结果:空白对照组ACC-2细胞内Rh123荧光强度最强,8.0μmol/LAs2O3处理组ACC-2细胞内Rh123荧光强度减弱,其差异有显著性(P〈0.05);随着As2O3药物浓度的增高(0,1,2,4,8μmol/L),ACC-2细胞的Caspase3酶活力单位逐渐增加。结论:As2O3作用于ACC-2细胞,可通过降低线粒体膜电位从而引起细胞凋亡。随着As2O3药物浓度的增高,ACC-2细胞的Caspase3酶活力单位逐渐增加,Caspase3被激活,细胞可发生不可逆转的凋亡过程。
简介:<正>DearSir,IamDr.Zhong-ShanChenfromtheDepartmentofOphthalmology,WuhanGeneralHospitalofGuangzhouMilitaryCommand,HubeiProvince,China.Iwritetopresenttwocaseswithserpiginouschoroiditis(SC)whichisarare,usuallybilateral,chronic,progressiveinflammationofthechoroid,choriocapillarisandretinalpigmentepithelium.InthispaperwepresentedthedifferentoutcomesofSCpatientswithorwithoutsystemicandoculartreatmentsafterlong-termfollow-up.