方法：年龄相关性白内障患者(50例63眼)随机分为试验组25例33眼和对照组25例30眼，两组患者手术方法相同，试验组植入非球面人工晶状体，对照组植入球面人工晶状体； 比较术后裸眼视力、最佳矫正视力，并检查两组患者对比敏感度和像差。

结果：术后1wk； 1，3mo两组患者裸眼视力相比差异无统计学意义(P>0.05)，术后3mo两组最佳矫正视力相比差异亦无统计学意义(P>0.05)。在非眩光和眩光条件下，两组患者在3.0，6.0，12.0，18.0cd频段下对比敏感度比较差异无统计学意义(P>0.05)； 在1.5cd频段下，试验组对比敏感度值显著高于对照组，组间比较差异具有统计学意义(P<0.05)； 术后3mo试验组球差、彗差均显著低于对照组，两组间比较差异具有统计学意义(P<0.05)。

结论：非球面人工晶状体在低频段对比敏感度显著优于球面人工晶状体，并能够降低白内障患者术后的总像差，从而提高白内障患者术后的视觉功能。

METHODS: A total of 50 cases(63 eyes)with age-related cataract were randomly divided into the experimental group(25 cases, 33 eyes)and a control group(25 cases, 30 eyes). Two groups of patients with operation method were same, the experimental group implantation of aspheric intraocular lens, control group with spherical intraocular lens implantation. Uncorrected visual acuity, best corrected visual acuity were compared, and two groups contrast sensitivity and wavefront aberration were checked.

RESULTS:After 1wk, 1 and 3mo, two groups of patients with uncorrected visual acuity was no significant difference(P>0.05). Three months after surgery, there were no significant differences in best corrected visual acuity compared the two groups(P>0.05). In the non-glare and glare condition, the patients in the two groups at 3.0, 6.0, 12.0, 18.0cd frequency contrast sensitivity difference was no significant(P>0.05); In the 1.5cd band, the experimental group contrast sensitivity was significantly higher than that of the control group(P<0.05). Three months after the operation, the experimental group spherical aberration, coma were significantly lower than those in the control group, there were significant differences between these two groups(P<0.05).

CONCLUSION: Aspheric intraocular lens in the low frequency contrast sensitivity is significantly better than the spherical intraocular lens, and can reduce the total aberration in cataract patients, so as to improve the postoperative visual function in cataract patients.