非球面散光矫正型多焦点人工晶状体植入术对白内障患者视力和对比敏感度的影响

目的：观察非球面散光矫正型多焦点人工晶状体植入术对白内障患者视力和对比敏感度的影响。
　　方法：将我院2014-05/2015-05期间行超声乳化人工晶状体植入术的合并有角膜规则散光的白内障患者58例72眼,随机分为两组：观察组植入散光矫正型多焦点人工晶状体29例36眼；对照组植入散光型单焦点人工晶状体29例36眼。术后随访1、6mo,观察术后患者的裸眼远视力(UCDVA)、裸眼近视力(UCNVA)、最佳矫正远视力(BCDVA)、最佳矫正近视力(BCNVA)、残余散光、暗光下对比敏感度。
　　结果：两组术后1、6mo UCDVA、BCNVA、BCDVA 以及残余散光的比较差异无统计学意义(P>0.05)；观察组术后1、6mo 的 UCNVA 优于对照组(P<0.05)；术后6mo 两组对比敏感度在高空间频率比较上差异有统计学意义(P<0.05)。
　　结论：非球面散光矫正型多焦点人工晶状体植入术治疗合并有角膜规则散光的白内障患者疗效确切,与散光型单焦点人工晶状体植入术比较均可改善患眼视力,且采用非球面散光矫正型多焦点人工晶状体植入术治疗后可获得更好的裸眼近视力和对比敏感度。

Effect of aspheric multifocal toric IOL implantation on visual acuity and contrast sensitivity in patients with cataract

AIM: To observe the effect of intraocular lens(IOL)implantation on visual acuity and contrast sensitivity in patients with cataract.

METHODS: Fifty-eight cases(72 eyes)cataract patients with regular cornel astigmatism, in our hospital from May 2014 to May 2015 were randomly divided into two groups to undergo phacoemulsification and IOL implantation: the observation group: 29 cases(36 eyes)received multifocal toric IOL implantation; the control group: 29 cases(36 eyes)received monofocal toric IOL implantation. Uncorrected distance visual acuity(UCDVA), uncorrected near visual acuity(UCNVA), best corrected distance visual acuity(BCDVA), the best corrected near visual acuity(BCNVA), total eye astigmatism, and the dark contrast sensitivity were observed for these patients at 1 and 6mo after cataract surgery.

RESULTS: There were no statistical significant difference between the two groups at postoperative 1, 6mo on UCDVA, BCNVA, BCDVA and total eye astigmatism(P>0.05). UCNVA of observation group at 1 and 6mo were better than those of control group(P<0.05); there were statistically significant difference in high frequency comparison at the sixth postoperative months(P<0.05).

CONCLUSION: Both monofocal toric IOL implantation, and aspheric multifocal toric IOL implantation for cataract with regular corneal astigmatism are effective to improve visual acuity. But the latter treatment would contribute to the improvement of uncorrected near visual acuity and the dark contrast sensitivity.