a
Anadultcatwaspresentedwithacataract(a).
成年猫由于白内障前来就诊。
i.Whatarethedark,finger-likeprojectionsnotedfromabouteightto12o’clock?
8点到12点位置的手指状黑色突出物是什么?
ii.Whattypeofcataractisdepictedina?
图a所示白内障是那种类型?
iii.Whatsecondaryclinicalsignsmightbenotedonexaminationofacatwiththistypeofcataract?
对患有这种类型白内障的猫进行检查时,可能会发现哪些继发性临床症状?
b
i.Pigmentedciliarybodyprocesses.Thelenszonulesarisefromtheseciliaryprocessesandattachatthelensequatortosuspendthelensinposition.
色素性睫状体突。晶状体小带起源于这些睫状体突,并附着在晶状体赤道上,使晶状体处于固定位置。
ii.Aresorbinghypermaturecataract.Hypermaturecataractsareassociatedwithareductioninlensvolume,awrinkledlenscapsule(b,histologicalimagefromaplasticsectionofaresorbingcataract),anincreasedabilitytovisualizethetapetalreflectionduetoareductioninlensopacification,andanincreaseinthedepthoftheanteriorchamber.Thereductioninlensvolumeduringtheresorptionofahypermaturecataractcausesthelenscapsuletocontractandpullonthelenszonules,andthusstretchtheciliaryprocesses.Thisisthereasonwhytheciliaryprocessesaresovisibleinthiseye.Anterioruveitiscanalsobenotedwithrapidlyformingandhypermaturecataracts.
一种吸收性过度成熟的白内障。过成熟白内障可见白内障体积减少、晶状体囊褶皱(b,塑形的吸收性白内障部分组织学图像),由于晶状体浑浊减轻而使脉络膜毯反射可见度增加,前房深度增加。在过度成熟的白内障吸收过程中,晶状体体积减小导致晶状体囊收缩并拉扯晶状体小带,从而拉伸睫状体突,这就是为什么睫状体突在该眼中如此可见的原因。快速形成和过度成熟的白内障前葡萄膜炎。
iii.Clinicalsignsassociatedwithanterioruveitis(e.g.flare,synechiae,rubeosisiridis)maybenotedwhenevaluatingacatwitharesorbinghypermaturecataract.Leakageoflensproteinsthroughtheintactlenscapsuleinitiatesaninflammatoryuveiticreaction,astheseproteinsarenotrecognizedasselfbytheeye’simmunesystem.
在评估患有吸收性过成熟白内障猫时,可能发现与前葡萄膜炎相关的临床症状(如房闪、粘连、虹膜潮红)。晶状体蛋白通过完整的晶状体包膜渗漏引起葡萄膜炎性反应,因为这些蛋白不能被眼睛的免疫系统识别。
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