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前囊切除术是囊外白内障摘除术中最有决定性的步骤之一,而切除前囊膜的大小和形状是按摘除晶体的内容物和保持晶体悬韧带处囊膜的完整性两方面要求设计的。囊膜切除术的最大切口是受悬韧带纤维附着在囊膜上的位置限制。晶状体韧带分为前、后二叶,分别附着在晶体赤道前后1—1.5mm 处的囊膜上,故截囊范围在直径6—7mm,太大易伤及悬韧带,太小易发生后发障及晶体核不能娩出。
Anterior capsulotomy is one of the most decisive steps in extracapsular cataract extraction. The size and shape of the anterior capsulotomy need to be designed in terms of both the contents of the crystal removed and the integrity of the capsule at the crystalline zonules of. The largest incision in capsulotomy is limited by the location of the suspensory ligament fibers attached to the capsule. Lens ligament is divided into before and after the second leaf, respectively, attached to the lens before and after the equator 1-1.5mm at the capsule, so the scope of the capsular bag diameter of 6-7mm, too easy to damage and suspension of the ligament, too prone to occur after Barrier and crystal nucleus can not be delivered.