i-Trace全功能视觉分析仪对非球面人工晶状体视功能的评价

目的 研究白内障摘除植入非球面人工晶状体对全眼高阶像差及调制传递函数(modulation transfer function:MTF)的影响.方法 连续选取41例(60只眼)老年性白内障患者,根据病人植入人工晶体的意愿分为对照组(球面人工晶体组)30只眼和试验组(非球面人工晶状体组)30只眼.术后用i-Trace全功能视觉分析仪分析二组全眼、角膜、晶状体高级像差和球面像差及MTF值.结果 术后试验组与对照组裸眼远视力差异无统计学意义,全眼和晶状体的高阶像差及球面像差差异有统计学意义,角膜高阶像差及球面像差差异无统计学意义,二组间高阶像差及球面像差下MTF值差异有统计学意义.结论 白内障手术植入非球面人工晶状体比植入球面人工晶状体可减少全眼的高阶像差和球面像差,提高成像质量,增加病人满意度.

Analyzing of visual functions of aspheric intraocular lenses using i-trace analyzer

Objective To studying the effect of high order aberrations (HOAs) and modulation transfer function (MTF) of eyes following cataracts surgeries with implanting aspheric intraocular lenses. Methods:60 eyes of 41 consecutive cataract patients were enrolled and performed phacoemulsification with IOLs implantations by same surgeon. 30 eyes of 20 patients were implanted aspheric IOLs (group 1 ),the others were spherical IOLs (group 2 ). All eyes of spherical aberrations and HOAs as well as MTF were measured postoperatively in whole eye, cornea and intraocular respectively using i-trace analyzer. Results: postoperatively, the uncorrected distance visual acuities were not statistically significant between group 1 and group 2.The HOAs and spherical aberrations in whole eye and intraocular were statistically significant lower in group 1 than group 2.Same statistically significant were also found in MTF. But the corneal aberrations in two groups were not statistically significant. Conclusions: the cataract surgery following implantation of aspheric IOL can reduce the HOAs and spherical aberrations than spherical IOLs in whole eye and intraocular. This would improve the image quality and make a better satisfaction to patients.