·(4)过熟期( hypermature stage):如果成熟期持续 时间过长,经数年后晶体内水分继续丢失,体 积缩小,囊膜皱缩,出现不规则的白色斑点及 胆固醇结晶,前房加深,虹膜震颤。晶体纤维 分解液化,呈乳白色,棕黄色的晶体核沉于囊 袋下方,可随体位变化而移动。称为 Morgagnian白内障。当晶体核突然下沉后,视 力可突然提髙。过熟期白内障囊膜变性,通透 性增加或出现细小的破裂。当液化的皮质漏出 时,可发生晶体诱发的葡萄膜炎。长期存在于 房水中的晶体皮质可沉积于房角,引起青光眼 称晶体溶解性青光眼。过熟期白内障的晶体悬 韧带发生退行性变,容易发生晶体脱位
• (4).过熟期（hypermature stage): 如果成熟期持续 时间过长，经数年后晶体内水分继续丢失，体 积缩小，囊膜皱缩，出现不规则的白色斑点及 胆固醇结晶，前房加深，虹膜震颤。晶体纤维 分解液化，呈乳白色，棕黄色的晶体核沉于囊 袋下方，可随体位变化而移动。称为 Morgagnian白内障。当晶体核突然下沉后，视 力可突然提高。过熟期白内障囊膜变性，通透 性增加或出现细小的破裂。当液化的皮质漏出 时，可发生晶体诱发的葡萄膜炎。长期存在于 房水中的晶体皮质可沉积于房角，引起青光眼。 称晶体溶解性青光眼。过熟期白内障的晶体悬 韧带发生退行性变，容易发生晶体脱位
The mature stage continued for over long time, generally volume of lens diminished, the capsular membrane shran for several years, the water in the lens lost continuously, the the anterior chamber deepened with iridodonesis. Lens fibers decomposed and dissolved in cream-white liquefaction, brown-yellow hard nuclear sank down, the anterior chamber in upper part became deep, called Morgagnian cataract. The nucleus may move with change of body position, vision may increased suddenly. Lens cortex leaked out of lens capsule may induce glaucoma. Severe vibration may make lens capsule rupture; lens mucleus dislocated into the chamber or vitreous body to induce glaucoma. Lens ligament was often retrograde degeneration that was easy to bring about lens dislocation
• The mature stage continued for over long time, generally for several years,the water in the lens lost continuously, the volume of lens diminished, the capsular membrane shrank, the anterior chamber deepened with iridodonesis. Lens fibers decomposed and dissolved in cream-white liquefaction, brown-yellow hard nuclear sank down, the anterior chamber in upper part became deep, called Morgagnian cataract. The nucleus may move with change of body position,vision may increased suddenly. Lens cortex leaked out of lens capsule may induce glaucoma. Severe vibration may make lens capsule rupture; lens mucleus dislocated into the chamber or vitreous body to induce glaucoma. Lens ligament was often retrograde degeneration that was easy to bring about lens dislocation
2.核性自内障( nuclear cataract 较皮质性白内障少见,发病年龄较早,进 展缓慢。混浊开始于胎儿核或成人核,前 者多见,逐渐发展到成人核完全混浊。初 期晶体核呈黄色混浊,但很难与核硬化相 鉴别。散瞳检查,在周边部环状红色反光 中,中央有一暗影,眼底检查可由周边部 看清。由于屈光力增加,可发生近视。可 发生单眼复视或多视。核性白内障以后逐 渐变为棕黄色或棕黑色。此时视力极度减 退,眼底已看不清
• 2. 核性白内障（nuclear cataract) • 较皮质性白内障少见，发病年龄较早，进 展缓慢。混浊开始于胎儿核或成人核，前 者多见，逐渐发展到成人核完全混浊。初 期晶体核呈黄色混浊，但很难与核硬化相 鉴别。散瞳检查，在周边部环状红色反光 中，中央有一暗影，眼底检查可由周边部 看清。由于屈光力增加，可发生近视。可 发生单眼复视或多视。核性白内障以后逐 渐变为棕黄色或棕黑色。此时视力极度减 退，眼底已看不清
3.后囊下白内障( subcapsular cataract 后囊下浅层皮质出现棕黄色混浊,为许多致密 小点组成,其中有小空泡和结晶样颗粒,外观 似锅巴状。由于混浊位于视轴,所以早期出现 明显视力障碍 It is a manifestation of cortical cataract, may happen beneath the anterior or posterior capsule. In posterior subcapsular cataract, there is disciform opaque beneath the posterior at early stage, composed of many dense punctate, with vacuoles and crystalloid granules among them, similar to the surface of slag brick called disciform cataract too. Subcapsular cataract may develop and form total cortical cataract
• 3. 后囊下白内障（subcapsular cataract) • 后囊下浅层皮质出现棕黄色混浊，为许多致密 小点组成，其中有小空泡和结晶样颗粒，外观 似锅巴状。由于混浊位于视轴，所以早期出现 明显视力障碍。 • It is a manifestation of cortical cataract, may happen beneath the anterior or posterior capsule. In posterior subcapsular cataract, there is disciform opaque beneath the posterior at early stage, composed of many dense punctates, with vacuoles and crystalloid granules among them, similar to the surface of slag brick called disciform cataract too. Subcapsular cataract may develop and form total cortical cataract
诊断( DIAGNOSIS) 散瞳后,以裂隙灯检査。根据晶体混浊 的形态和视力情况可明确诊断。当视力 减退与视力情况不符合时,应进一步检 查,避免因晶体混浊而漏诊其他眼病
诊断（DIAGNOSIS） • 散瞳后，以裂隙灯检查。根据晶体混浊 的形态和视力情况可明确诊断。当视力 减退与视力情况不符合时，应进一步检 查，避免因晶体混浊而漏诊其他眼病