应用几何学计算晶状体后囊撕囊面积的探讨  

Geometric calculation of the area in posterior continuous curvilinear capsulorhexis

作　　者：肖键 

机构地区：[1]广西壮族自治区昭平县医院,546800

出　　处：《眼外伤职业眼病杂志》2003年第8期544-545,共2页Journal of Injuries and Occupational Diseases of the Eye with Ophthalmic Surgeries

摘　　要：目的　探讨后囊撕囊面积的理论根据。方法　根据简化眼屈光学原理 ,应用几何学计算方法进行后囊有效光学区的面积计算。结果　以直径 5mm的角膜光学区面积的光线经折射后在后囊上的光斑面积是直径为 0 40 2 5mm的范围。结论　结合人工晶状体植入术后有偏心现象认为 :后囊撕囊面积直径在 1～ 1 5mm为宜 ,最大不宜超过 2mm 。Objective A geometric study in the area of lens posterior continuous curvilinear capsulorhexis.Methods According to the refraction of the simplified eye,the posterior capsulorhexis area was calculated by geometric method.Results A light spot of 5 mm in diameter on the cornea will become 0.4035 mm in diameter after corneal refraction on the posterior capsulorhexis area.Conclusion Take into account posterior chamber intraocular lens tilt and decentration phenomenon,the ideal posterior continous curvilinear capsulorhexis is 1-1.5 mm in diameter,but not over to 2 mm.Excess curvilinear capsulorhexis is not favorable to posterior barrier.

关 键 词：白内障 后囊撕囊面积 几何学计算方法 眼屈光学 人工晶状体植入术 

分 类 号：R779.66[医药卫生—眼科] R776.1[医药卫生—临床医学]