非球面单焦点及多焦点人工晶体眼高阶像差及对比敏感度比较

目的探讨非球面、单焦点及多焦点人工晶体眼的对比敏感度及高阶像差的差别。方法病人进行随机分组,其中一组病人植入非球面人工晶体Z9001,一组植入单焦点人工晶体SA60AT,一组植入多焦点人工晶体SA40N,共124只眼进入本研究。术后由Allegretto Wave Analyzer(Allegretto,Germany)像差仪测量高阶像差,由CSV-1000E(Vector Vision,USA)测量对比敏感度。结果术后的最佳矫正视力,瞳孔直径,撕囊口直径的大小及角膜高阶像差比较,组间差异不具有统计学意义。术后的高阶像差测量,其中球面像差、4阶高阶像差及总体像差比较中SA40N组大于SA60AT组,SA60AT组大于Z9001组。对比敏感度比较,在所有的空间频率3、6、12、18cpd,Z9001组大于SA60AT组,SA60AT组大于SA40N组。结论多焦点人工晶体眼较单焦点人工晶体相比,可以引起眼的高阶像差增加,对比敏感度降低。非球面人工晶体可以减少球面像差、增加对比敏感度。

Aberration and contrast sensitivity comparison of non-spherical and monofocal and multifocal intraocular lens eyes

Objective To compare high-order aberration and contrast sensitivity in patients who had been underwent phacoemulsification cataract extraction and implantation of non-spherical and monofocal and multifocal intraocular lens. Methods One hundred and twenty four eyes were included in this study. The eyes were randomly divided into 3 groups according to the type of IOLs. One group was non-spherical IOL groups, one group was monofocal IOL group and the other group was multifocal IOL group. The patients were implanted Z9001, SA60AT. and SA40N respectively. The aberrations were measured with the Tscherning-type wavefront aberrometer, Allegretto Wave Analyzer (Allegretto, Germany) after surgery. The contrasts sensitivity were measured with CSV-1000E (Vector Vision, USA). Result There was no statistical difference in BCVA, pupil diameter, curvilinear capsulorhexis size and corneal aberration. There was statistical difference in the three groups in spherical, 4-order high aberration and whole high-order aberrations. The SA40N group was much higher than the SA60AT group. The SA60AT group was higher than Z9001 group. There was statistical difference in the contrast sensitivity in the 3, 6, 12 and 18 spatial frequencies. In the spatial frequencies, the Z9001 group was higher than SA60AT group and SA60AT group was higher than SA40N groups. Conclusions Though multifocal intraocular lens can provide the patients near and far vision after surgery, but can increase high-order aberration and affluence contrast sensitivity. The non-spherical IOL can reduce the aberration and improve contrast sensitivity as compared with the monofocal IOLs.