先天性白内障PPT课件

lar cataracts) 特点是在晶状体前囊膜中央的局限性浑浊,浑浊范围不等,有≤0.1mm的小白点浑浊在瞳孔区。呈一白色的锥状隆起。双侧患病,静止不发展,视力无明显影响,可不治疗?2.后极性白内障(posterior polar cataracts) 特点为晶状体后囊膜中央区的局限性浑浊,边缘不齐,形态不一,呈盘状、核状或花瓣状。常伴有永存玻璃体动脉。少数病变为进行性,多数静止。很少有严重的视力减退。在青少年时期,后极部的浑浊想皮质区发展,形成放射状浑浊,对视力有一定影响Р(二)极性白内障РRight eyeРLeft eyeРThe patient in these photographs had anterior polar cataracts that were more prominent in the left eye than the right. Only the left cataract was visually significant.Р很常见,占40%。Р因浑浊位于核周围的层间,故又称板层白内障(lamellar cataract)。表现是在胎儿核的周围绕核浑浊,这些浑浊由许多细小白点组成,皮质和胚胎核透明。在浑浊区的外周,有“V”形浑浊骑跨在浑浊带前后,称“骑子(rider)”。Р通常静止不发展,双侧性。由于核中央透明,视力影响不十分严重。Р(四)绕核性白内障(perinuclear cataract)РLamellar cataractРThis lens shows an opacified zone in the outer nucleus with the typical riders, curvilinear opacities in the outer parts and outside of the opacified zone.