摘要
目的 探讨正常瞳孔下非球面及球面晶状体眼高阶像差的差别,分析计算非球面与球面晶状体消除球面像差的差值,以客观评价非球面人工晶状体的临床效果.方法 回顾性临床对照研究.选取2010年1～4月在深圳市眼科医院行白内障超声乳化联合人工晶状体植入术的患者50例（66只眼）.病人进行随机分组,分别植入非球面人工晶状体（KS-AIN）和球面人工晶状体（KS-X）.术后1月正常瞳孔下（3～5mm）,由itrace波前像差仪测量高阶像差及i-trace3.1软件模拟瞳孔直径3mm及5mm的调制传递函数值MTF.运用两样本t检验进行比较分析.结果 正常瞳孔下非球面组球面像差小于球面组,其差异具有统计学意义（P〈0.05）;非球面晶状体与球面晶状体相比较可消除球面像差（0.069 ±0.026）μm（D-Value）;非球面组高阶像差均方根小于球面组,但差异无统计学意义（P〉0.05）;彗差、三叶草比较亦无统计学意义（P〉0.05）;3mm瞳孔下两组晶状体MTF值的比较仅在空间频率5周/度差异有统计学意义（P〈0.05）.5mm瞳孔下非球面晶状体眼在各空间频率的MTF值均好于球面晶状体眼,比较有统计学意义（P〈0.05）.结论 正常瞳孔下非球面人工晶状体眼与球面人工晶状体相比,可以有效减少球面像差,提高部分空间频率的对比敏感度,使患者拥有更好地视觉质量,但其不能体现可以减少术眼高阶像差的优势.
Objective To compare the high order aberrations between implantations of aspherical and spherical intraocular lens with normal pupil diameter, calculate and analyze the differences in spherical aberration between the eyes implanted with aspherical and spherical intraocular lens in order to assess the visual quality and investigate the clinical results. Methods Fifty patients（66 eyes）with cataract underwent surgery from Jan 2010 to Apr 2010, and were divided into 2 groups randomly. Group 1： unifocal and aspherical intraocular lens（negative aberration KS-AIN）, Group2： unifocal and spherical intraocular lens（KS-X）. Sixty-six eyes were included in this study. The aberrations at normal pupil diameter（interval 3mm-5mm）were measured with the i-Trace wavefront aberrometer. Modulation transfer functions were collected at 3mm and 5mm pupil size. Independent-Samples t Test was used to analyze the data. Results No post-operative complication occurred in each group. The average uncorrected visual acuity（UCVA）was ≥ 0.5, and the average best corrected visual acuity（BCVA）was ≥ 0.6. With normal pupil diameter（mean 3.73± 0.49mm）, aspheric IOL group showed less spherical aberration than spherical IOL group with statistical significance（P =0.0040.05, t =-3.216）, the difference value（D-value）of spherical aberration was 0.069± 0.026？m. Also aspheric IOL group showed less aberration than spherical IOL group in total higher-order root-mean-square（total HOA RMS）values, but with no statistical difference（P 〉0.05）. There were no significant differences in coma and trefoil values between each group（P 〉0.05）. With 3mm pupil diameter, aspheric IOL group provided a statistically better contrast sensitivity only in 5 cycle/degree while a statistically better contrast sensitivity in all spatial frequencies with 5mm pupil diameter. Conclusions The aspheric lens provides the patients better quality of vision at normal pupil size compared to spherical lens because of the decreased sphe
出处
《中国实用眼科杂志》
CSCD
北大核心
2011年第5期435-438,共4页
Chinese Journal of Practical Ophthalmology
