多焦点人工晶状体眼对比敏感度的研究

A study on contrast sensitivity of multifocal intraocular lens.

目的观察多焦点人工晶状体植入术后对比敏感度的改变情况,并与单焦点人工晶状体植入者进行比较。方法我院住院的老年性白内障44例(60眼),随机分为两组,每组30眼,均行晶状体超声乳化吸出术。A组植入多焦点人工晶状体,B组植入单焦点人工晶状体。术后1天检查远、近视力,3月进行远、近视力及对比敏感度等视功能的检查,并问卷调查视物情况及视觉症状。结果A组具有与B组一样良好的非矫正远视力(分别为1.00±0.27和0.89±0.23,P>0.05),非矫正近视力A组明显优于B组(分别为0.86±0.27和0.45±0.14,P<0.05);两组患者对比敏感度在低、中空间频段均位于正常范围内,高空间频段则有部分病例稍下降,但两组差异无统计学意义(P>0.05)。多数患者对手术效果满意,A组近距离作业满意度高于B组(85.71%3、4.78%、P<0.05);脱镜两组患者视觉症状均较少(10.00%、3.33%,P>0.05)。结论两种人工晶状体植入术后患者对比敏感度改变无差别,但多焦点人工晶状体植入术后近视力更好,减少了对近用镜的依赖,患者满意度高。

Objective Comparing the contrast sensitivity （CS） of the ： multifocal intraocular lens （MIOL） eye with monofocal intraocular lcns（SIOL） eye in order to evaluate the effectiveness and safety of the MIOL. Methods 44 senile cataract patients （60 eyes） were devided into two groups randomly： Group MIOL and Group SIOL. Each group included 30 eyes. All the patients accepted phacoemulsification and MIOL/SIOL implantation. The MIOL we used is AMO Array SA40N while the SIOL is Allergan SI40NB. Distance visual acuity （DVA） and near visual acuity （NVA） were observed at 1 day postoperatively. Visual function including DVA and NVA ,CS were measured at the 3rd month postoperatively. Visual symptoms were observed by questionnaire. Results MIOL eye showed excellent DVA as SIOL eye （1.00± 0.27 versus 0. 89±0.23, P〉0.05） and better NVA than the later （0.86±0.27, 0.45±0.14, P〈0.05）. The CS of both groups were within the reference range and were identical at 1.5,3 and 6 cpd spatial frequencies. At 12 and 18 cpd, the CS of some cases of the two groups lower than reference range. Most patients were satisfied with the result of the operation but higher satisfaction was found in MIOL group when near task was asked. Conclusion MIOL is safe and effective. MIOL＇s CS is not different with SIOL＇ . It can provide good DVA as the SIOL does, but better NVA, less glasses use and higher satisfaction than the latter.