Montés-Micó Robert, Alió Jorge L
Research, Development and Innovation Department, Ophthalmologic Institute of Alicante, and the School of Medicine, University Miguel Hernández, Spain.
J Cataract Refract Surg. 2003 Apr;29(4):703-11. doi: 10.1016/s0886-3350(02)01648-6.
To evaluate contrast sensitivity at distance and near after multifocal intraocular lens (IOL) implantation.
Ophthalmologic Institute of Alicante, University Miguel Hernández, Alicante, Spain.
Contrast sensitivity was measured with the Stereo Optical Functional Acuity Contrast Test at distance and near in 21 patients with a refractive multifocal IOL (Array SA-40N, AMO). A control group with a monofocal IOL (SI-40NB, AMO) was also studied to allow comparison of results. Contrast sensitivity was measured 1, 3, 6, 12, and 18 months after IOL implantation.
There was a statistically significant greater reduction in contrast sensitivity at distance at all spatial frequencies in the multifocal group than in the monofocal group during the first month. At 3 months, contrast sensitivity at 12 and 18 cycles per deg remained reduced in the multifocal group; contrast sensitivity at the other frequencies did not differ from that in the monofocal group (P > 0.1). At 6, 12, and 18 months, contrast sensitivity at all spatial frequencies was not significantly different between groups (P > 0.1). There was a statistically significant greater reduction in near contrast sensitivity in the multifocal group than in the monofocal group at all spatial frequencies during the first and third month after surgery (P <.01). No statistically significant differences were found between groups after 6 months (P > 0.1). Contrast sensitivity at distance and near in the multifocal group improved over time (P <.01).
The Array IOL provided contrast sensitivity at distance comparable to that obtained with the monofocal IOL between 3 and 6 months after implantation. Near contrast sensitivity improved over time but was always lower than at distance and in the monofocal near-corrected patients, which is acceptable to avoid near visual function degradation.
评估多焦点人工晶状体（IOL）植入术后远距离和近距离的对比敏感度。
西班牙阿利坎特米格尔·埃尔南德斯大学阿利坎特眼科研究所。
对21例植入折射型多焦点IOL（Array SA - 40N，AMO）的患者，使用立体视觉功能视力对比测试法测量其远距离和近距离的对比敏感度。还研究了一组植入单焦点IOL（SI - 40NB，AMO）的对照组，以便比较结果。在IOL植入后1、3、6、12和18个月测量对比敏感度。
在第一个月，多焦点组在所有空间频率下远距离对比敏感度的降低在统计学上显著大于单焦点组。在3个月时，多焦点组中每度12和18周波的对比敏感度仍降低；其他频率的对比敏感度与单焦点组无差异（P>0.1）。在6、12和18个月时，两组在所有空间频率下的对比敏感度无显著差异（P>0.1）。在术后第一个月和第三个月，多焦点组在所有空间频率下近距离对比敏感度的降低在统计学上显著大于单焦点组（P<0.01）。6个月后两组间未发现统计学上的显著差异（P>0.1）。多焦点组远距离和近距离的对比敏感度随时间改善（P<0.01）。
Array IOL在植入后3至6个月提供的远距离对比敏感度与单焦点IOL相当。近距离对比敏感度随时间改善，但始终低于远距离以及单焦点近视力矫正患者，这对于避免近视力功能下降是可接受的。
