目的探讨Acrysof IQ Restor Toric人工晶状体植入术前后患眼散光、像差及调制传递函数(modulation transfer function,MTF)值变化,评价此种晶状体对术眼视觉质量的影响。方法观察在我院行白内障超声乳化摘出联合IQ Restor Toric IOL植...目的探讨Acrysof IQ Restor Toric人工晶状体植入术前后患眼散光、像差及调制传递函数(modulation transfer function,MTF)值变化,评价此种晶状体对术眼视觉质量的影响。方法观察在我院行白内障超声乳化摘出联合IQ Restor Toric IOL植入的白内障合并角膜散光≥1.0 D的患者8例(10眼),分别于术前、术后1个月、3个月测量裸眼远中近视力、最佳矫正远近视力、等效球镜、残余散光及IOL轴位、总低阶像差和高阶像差、MTF值并问卷调查视觉满意度等。结果术后3个月,裸眼远视力为0.85±0.30,最佳矫正远视力为0.92±0.27,裸眼近视力为0.73±0.22,最佳矫正近视力为0.76±0.20,裸眼中视力为0.62±0.18;等效球镜度数≤±0.5 D者9眼(90%)。术后3个月全眼总散光由术前的(1.50±0.41)D降至(0.28±0.43)D(t=6.124,P=0.000),与术前预计残留散光(0.13±0.09)D相比差异无统计学意义(P>0.05)。术后3个月,IOL轴位偏离(3.20±1.55)°。所有瞳孔直径下,总像差、低阶像差、高阶像差、球差与术前相比均有显著下降(均为P<0.05),术后3 mm瞳孔直径下的总像差、低阶像差和高阶像差(P=0.034、0.044、0.005)以及5 mm瞳孔直径下的总像差、低阶像差、散光像差(P=0.048、0.033、0.046)随时间推移仍有显著降低,余像差随时间变化虽有下降,但差异均无统计学意义(均为P>0.05)。不同瞳孔直径下,MTF值在各个空间频率下与术前相比均有显著提高(均为P<0.05)。结论 Acrysof IQ Restor Toric多焦点散光型人工晶状体能为白内障患者提供良好的全程视力和有效的散光矫正,减少了全眼高阶像差和球差,从而提高了患者的术后视觉质量。展开更多
AIM： To evaluate corneal astigmatism after phacoemulsification using 2.2 mm or 1.8 mm clear corneal micro-incisions and its effects on visual function.METHODS： Sixty cases （60 eyes） with cataract were randomly div...AIM： To evaluate corneal astigmatism after phacoemulsification using 2.2 mm or 1.8 mm clear corneal micro-incisions and its effects on visual function.METHODS： Sixty cases （60 eyes） with cataract were randomly divided into groups A （n=30） and B （n=30） respectively underwent 2.2 mm and 1.8 mm clear corneal tunnel incision phacoemulsification combined with folding intraocular lens implantation from the time direction of 11：00. On day 1 and at 1, 4, and 6wk after operation, patients’ vision was measured and both the corneal curvature and corneal thickness （CT） were recorded using Pentacam.RESULTS： The measured surgery-induced astigmatism （SIA） in both groups A and B peaked on day 1 after operation, and then gradually decreased and eventually stabilized in week 4. No statistically significant difference was found in corneal astigmatism between two groups （P〉0.05）. The measured corneal astigmatism at 4wk and 6wk postoperatively were 0.28±0.09 D and 0.27±0.10 D for groups A and 0.27±0.09 D and 0.25±0.10 D for groups B without statistically significant difference （P〉0.05）. In addition, no significant differences in visual acuity and CT were found between groups A and B before or after operation.CONCLUSION： Both 2.2 mm and 1.8 mm micro-incision cataract surgeries result in relatively small SIA with no difference in visual function and corneal astigmatism between two surgery approaches. Thus, the two types of surgical systems are safe and efficient for cataract treatment, by which satisfactory uncorrected visual acuity can be regained early postoperatively.展开更多
文摘AIM： To evaluate corneal astigmatism after phacoemulsification using 2.2 mm or 1.8 mm clear corneal micro-incisions and its effects on visual function.METHODS： Sixty cases （60 eyes） with cataract were randomly divided into groups A （n=30） and B （n=30） respectively underwent 2.2 mm and 1.8 mm clear corneal tunnel incision phacoemulsification combined with folding intraocular lens implantation from the time direction of 11：00. On day 1 and at 1, 4, and 6wk after operation, patients’ vision was measured and both the corneal curvature and corneal thickness （CT） were recorded using Pentacam.RESULTS： The measured surgery-induced astigmatism （SIA） in both groups A and B peaked on day 1 after operation, and then gradually decreased and eventually stabilized in week 4. No statistically significant difference was found in corneal astigmatism between two groups （P〉0.05）. The measured corneal astigmatism at 4wk and 6wk postoperatively were 0.28±0.09 D and 0.27±0.10 D for groups A and 0.27±0.09 D and 0.25±0.10 D for groups B without statistically significant difference （P〉0.05）. In addition, no significant differences in visual acuity and CT were found between groups A and B before or after operation.CONCLUSION： Both 2.2 mm and 1.8 mm micro-incision cataract surgeries result in relatively small SIA with no difference in visual function and corneal astigmatism between two surgery approaches. Thus, the two types of surgical systems are safe and efficient for cataract treatment, by which satisfactory uncorrected visual acuity can be regained early postoperatively.
