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1、最新DiabeticRetinopathy:糖尿病性视网膜病变-药学医学精品资料ThehealthyeyeLightraysentertheeyethroughthecornea,pupilandlens.Theselightraysarefocuseddirectlyontotheretina,thelight-sensitivetissueliningthebackoftheeye.Theretinaconvertslightraysintoimpulses;sentthroughtheopticn
2、ervetoyourbrain,wheretheyarerecognizedasimages.2Whatisdiabetes?DiabetesMellitusistheinabilityofthebodytouseandstoresugarproperly,resultinginhighbloodsugarlevels.Resultsinchangesinveins,arteriesandcapillariesinthebody.3NonproliferativediabeticretinopathyW
3、ithNPDR,yourcentralvisionisaffectedbyanyofthefollowing:Hardexudatesonthecentralretina(macula).Microaneurysms(smallbulgesinbloodvesselsoftheretinathatoftenleakfluid).Retinalhemorrhages(tinyspotsofbloodthatleakintotheretina).Macularedema(swelling/thickenin
4、gofmacula).Macularischemia(closingofsmallbloodvessels/capillaries).7NonproliferativediabeticretinopathyMacularedemaMaculathickensorswells,affectingvision.Mostcommoncauseofvisionlossindiabetes.Visionlossmaybemildtosevere.Peripheral(side)visionremains.Lase
5、rtreatmentmayhelptostabilizevision.8NonproliferativediabeticretinopathyMacularischemiaSmallbloodvessels,orcapillaries,close,blurringvision.Maculanolongerreceivesenoughbloodtoworkproperly.Currentlynoeffectivetreatmentformacularischemia.9Proliferativediabe
6、ticretinopathy(PDR)Laterstagesofdiabeticretinopathy.Abnormalbloodvesselsbegintogrowonsurfaceofretinaoropticnerve;can’tprovideretinawithnormalbloodflow(neovascularization).PDRcancauseseverevisuallossandotherseriouscomplications,suchasneovascularglaucomaan
7、dlossoftheeye.Top:HealthyretinaBottom:RetinawithPDRandneovascularization10ProliferativediabeticretinopathyWithPDR,visionisaffectedwhenanyofthefollowingoccur:Vitreoushemorrhage(new,abnormalbloodvesselsbleedintovitreousgelincenterofeye,preventinglightraysf
8、romreachingtheretina).Tractionretinaldetachment(new,abnormalbloodvesselsbegintoshrinkandtugonretina;maycauseretinatodetach).Neovascularglaucoma(neovascularizationoccursintheiris,causingpressuretobuildupintheeye,damagingthe