Comparison of diathermic high-frequency capsulorhexis and continuous curvilinear capsulorrhexis in white cataract surgery

AIM： To compare the corneal endothelial cell counts pre-and post-operation, ultrastructure of anterior lens capsule and surgical completion after diathermic highfrequency capsulorhexis（DHC） and continuous curvilinear capsulorrhexis（CCC） applied in phacoemulsification（PHACO） of white cataract surgery.METHODS： Sixty-six eyes of 66 patients（33 males and 33 females） with cataract aged between 60 and 80 y（mean 72.5±5.5） were recruited and undergone the surgery from June 2014 to November 2016. Anterior lens capsule, derived from two kinds of capsulorhexis, were randomly divided into two groups according to random number table. The ultrastructure of the capsule edge and its closer tissue were observed by transmission electron microscopy（TEM） and optical microscopy respectively. The surgical completion conditions and corneal endothelial cell counts were analyzed pre-and post-operation after two capsulorhexis.RESULTS： The capsule derived from CCC had smooth edge, well-organized cellular structure and the cells filling into the cutting edge under TEM and optical microscopy. The capsule derived from DHC had an approximate 60 banded area of cell degeneration and necrosis, with dentiform prominences at the edge of the capsule, and no cell structure was observed at this area. The corneal endothelial cell counts of both groups were slightly declined 1 wk post-operation compared with that of preoperation. There was no statistical difference between the two groups（t=1.63, P〉0.05）.CONCLUSION： DHC shows good clinical value in white mature and hypermature cataract surgery.

高频透热撕囊法在白内障手术中的应用

目的:评价在白内障手术中使用高频透热撕囊仪作连续环形撕囊的效果。方法:在30例(34眼)患者进行白内障囊外摘出联合后房型人工晶体植入术中,先向前房注入透明质酸钠,然后使用高频透热撕囊仪作晶体连续环形撕囊术。结果:有3眼术中出现小的晶体前囊放射状撕裂,所有病例术后角膜无水肿,无其他术后合并症,术后一周31眼矫正视力≥0.5,占91.2％。结论:此法操作简便,易于掌握,是一个安全有效的连续环形撕囊的方法。尤其适用于过熟期白内障,儿童先天性白内障和外伤性白内障的截囊。眼科学报1999;15:121—123。