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目的:针对不同材料及连续环形撕囊术中人晶状体囊,测量其撕裂角度和力度,并评价所产生的压力。方法:通过用钝针头撕裂不同的材料,例如铝薄纸、多种薄层移植修复材料以及人晶状体囊,测量撕裂角度和作用力方向,评价在此过程中上述可撕裂材料表面所潜在增加的压力,以及在不同年龄(10～17岁)24只尸体眼中对前房深度和玻璃体压力所产生的影响。结果:每种材料所产生的撕裂角度是唯一的,随着年龄的增长其撕裂角度和力度反而降低(从10岁的85°到50岁以上的10°)。增加的玻璃体压力和降低的前房深度导致了撕裂点的高压力。在本文中讨论了连续环形撕囊术中安全的手术方法。结论:在连续环形撕囊术中理解力的矢量和物理过程,这对于良好的操作和避免放射状撕裂是必要的。在连续环形撕囊术中应该要考虑到不同年龄和不同类型白内障的晶状体囊性质的改变会导致不同的撕裂角度和力度。
OBJECTIVE: To measure the tearing angle and strength of human lens capsule in different materials and continuous circular capsulorhexis, and to evaluate the pressure generated. Methods: Tear angle and force direction were measured by tearing different materials, such as aluminum tissue, various thin-grafted prosthetic materials, and human lens capsule with a blunt needle to evaluate the surface of the above-mentioned tearable material Potentially increasing stress, and the effect on anterior chamber depth and vitreous pressure in 24 cadaver eyes of different ages (10-17 years). RESULTS: The tearing angle produced by each material was unique. Tearing angles and velocities decreased with age (85 ° at 10 years and 10 ° at 50 years of age). Increased vitreous pressure and decreased anterior chamber depth result in high tear point pressure. In this article, we discuss a safe surgical procedure for continuous circumferential capsulorhexis. Conclusions: The vectorial and physical processes of force are understood in continuous circumferential capsulorhexis, which is necessary for good handling and avoidance of radial tearing. It should be taken into account in continuous circumgyngeal capsulotomy that changes in lens capsule properties of different age and types of cataracts lead to different tearing angles and velocities.