简介：视网膜色素变性是一类以光感受器细胞及色素上皮细胞功能丧失为共同表现的疾病，具有遗传倾向性，通过选择不同的视网膜色素变性（relinitispigmentosa，RP）动物模型可以针对不同遗传方式的RP进行研究，皇家外科学院（royalcollegesurgeons，RCS）大鼠是常染色体隐性遗传的经典动物模型，现将基于RCS大鼠模型的RP治疗研究进展综述如下。

简介：目的利用Micro-CT扫描数据建立中耳听骨链三维有限元模型。方法用Micro—CT扫描成人颞骨标本，将获得的图像数据通过MicroView、Mimics等软件进行三维重建。再将模型转入其有限元分析（finiteelementanalysis，FEA）模块的Remesh环境中进行调整、细化及面网格优化，通过SOLIDEWORK软件转换为实体网格。结果初步形成的三维几何模型可较清晰地辨别鼓室腔、听小骨和内耳系统，但部分图像不同程度存在噪点。最终形成了FEA软件可识别的成人中耳听骨链三维有限元网格模型，网格划分后的听骨链有限元模型中，完整听骨链的节点数降低，由原来包括805个不合理节点在内的12498个节点降低到2050个，在此基础上建立的有限元模型共1350个8节点四面体单元。结论结合Micro—CT技术及Mimics软件的三维建模方法可以快速获得较精确的听骨链三维数据，是建立听骨链三维有限元模型的有效途径。（中国眼耳鼻喉科杂志，2009．9．83。85）

简介：AIM:Tofindasimplemathematicalcorrelationbetweenthelensbasecurve(BC)andkeratometryfindings(krf).METHODS:Thisretrospectivestudyincluded400keratoconiceyes(350patients)previouslyfitwithrigidcontactlensesatanacademiceyecenteroverafiveyearperiod.Thepatientswereclassifiedintofivegroupsbasedonthekeratometryfindings(krf<7,krf:7-8,krf>8,krf-krs(differencebetweentwokeratometry;flatandsteep)=0.3-0.6,krf-krs>0.6mmasgroups1to5,respectively.MultivariatelinearregressionandMunro’scorrelationcoefficientwereemployedtodefertheformulas.RESULTS:Alinearcorrelationcouldbefoundinallgroupsexceptforpatientsingroup3.Forgroup1,BC=0.211×krf+5.904.Forgroup2,BC=0.456×krf+4.160.Forgroup4,BC=0.321×krf+5.219.Forgroup5,BC=0.337×krf+5.090.CONCLUSION:ThedevelopmentofnewformulasforRGPfittingenablesophthalmologiststoworkwithconfidenceandpreventsunnecessaryandfrequentlenstrials.Thecustomarylensfittingmethodsareneededtobereplacedbynewformulas,whichhelptosavetimeandcosts.

简介：AIM:Todescribethedesignandpreliminaryresultsofthehospitalbasedepidemiologicalstudyfordiabeticretinopathy(HBESDR),anongoingepidemiologicalstudytoestimatetheprevalenceofdiabeticretinopathy(DR)andtoelucidatetheclinical,anthropometric,biochemicalandanyotherriskfactorsassociatedwithdiabeticretinopathy.METHODS:Totally2000diabeteswillberecruitedfromtheDiabeteseyeclinicintheFirstAffiliatedHospitalofChinaMedicalUniversity.AllsubjectsunderwentbloodsugarestimationandOralGlucoseToleranceTesttodiagnosediabetes.Alldiabeteswouldundergocompletequestionnaire,acomprehensiveeyeexamination.Bloodandurinewouldbecollectedforbiochemicalinvestigations.AllfundusphotographsforanyDRwillbegraded.Participantswhoneedtreatmentwillbesenttotheophthalmicclinicandfollow-upintervalprogramforallsubjectswillbesuggested.Acomputerizeddatabaseiscreatedfortherecords.RESULTS:Todate,1174diabeteshavebeenrecruited,therewere350(29.81%)DRinalldiabetes,mostofthemwerewithmildnon-proliferativediabeticretinopathy(NPDR)(139,39.71%);71(20.29%)moderateNPDR,66(18.86%)severeNPDR,74(21.14%)proliferativediabeticretinopathy(PDR).Females,longerdurationofdiabetes,familyhistoryofdiabetesandhypertensionhadastatisticallysignificantincreaseinriskofanyDR.CONCLUSION:ThestudyisexpectedtoprovideanestimateoftheoverallprevalenceofDRandtheprevalencewithdifferentdurationofdiabetesandalsoabetterunderstandingoftheriskfactorsassociatedwithDR.