Department of Ophthalmology, Medisch Centrum Haaglanden, The Hague, The Netherlands.
J Refract Surg. 2010 Jun;26(6):423-9. doi: 10.3928/1081597X-20090710-05. Epub 2010 Jun 17.
To determine the effects of Artiflex phakic intraocular lens (PIOL) implantation on best spectacle-corrected high and low contrast visual acuity under photopic and mesopic conditions.
Forty-two consecutive eyes had implantation of a foldable iris-supported PIOL to correct myopia. The mean preoperative spherical equivalent refraction was -7.26+/-1.91 diopters (D) (range: -4.90 to -13.60 D). The high (100%) and low (2.5%) contrast visual acuity with best spectacle correction was tested with translucent logarithmic visual acuity charts (Precision Vision) under photopic and mesopic conditions.
At mean 7.6+/-5.4 months after PIOL implantation, the mean high and low contrast visual acuity under photopic and mesopic conditions had significantly increased from preoperatively: photopic high contrast visual acuity from -0.07+/-0.11 logMAR to -0.14+/-0.08 logMAR (P<.001); photopic low contrast visual acuity from 0.48+/-0.14 logMAR to 0.36+/-0.11 logMAR (P=.011); mesopic high contrast visual acuity from -0.09+/-0.09 logMAR to -0.16+/-0.08 logMAR (P<.001); and mesopic low contrast visual acuity from 0.50+/-0.13 logMAR to 0.33+/-0.10 logMAR (P<.001). Mean postoperative spherical equivalent refraction was -0.21+/-0.28 D (range: +0.50 to -0.75 D). Of all eyes, 91.9% were within 0.50 D of attempted correction, and 67% gained 1 or more lines of best spectacle-corrected visual acuity (BSCVA). No eye lost 2 or more lines of BSCVA.
Artiflex PIOL implantation for the correction of moderate to high myopia seems to be a safe and predictable procedure, which resulted in increased high and low contrast visual acuity under photopic and mesopic conditions.
探讨虹膜支撑型可折叠人工晶状体（PIOL）植入术对明、暗光条件下近视患者最佳矫正视力的影响。
对 42 例（42 眼）近视患者行可折叠虹膜支撑型 PIOL 植入术，术前平均等效球镜度为-7.26+/-1.91 屈光度（D）（范围：-4.90 至-13.60 D）。采用Precision Vision 半透明对数视力表在明、暗光条件下检查患者最佳矫正视力的高（100%）、低（2.5%）对比度视力。
PIOL 植入术后平均 7.6+/-5.4 个月，与术前相比，患者暗光及明光照度下的高、低对比度视力均显著提高：明光照度下的高对比度视力从-0.07+/-0.11 对数视力记录（logMAR）提高至-0.14+/-0.08 logMAR（P<.001）；明光照度下的低对比度视力从 0.48+/-0.14 logMAR 提高至 0.36+/-0.11 logMAR（P=.011）；暗光下的高对比度视力从-0.09+/-0.09 logMAR 提高至-0.16+/-0.08 logMAR（P<.001）；暗光下的低对比度视力从 0.50+/-0.13 logMAR 提高至 0.33+/-0.10 logMAR（P<.001）。术后平均等效球镜度为-0.21+/-0.28 D（范围：+0.50 至-0.75 D）。所有患者中，91.9%的患者术后屈光度在目标矫正值的 0.50 D 以内，67%的患者获得 1 行或更多的最佳矫正视力（BSCVA）提高。无患者视力下降 2 行或更多。
对于中高度近视患者，虹膜支撑型可折叠人工晶状体植入术是一种安全、可预测的手术方法，可提高明、暗光条件下的高、低对比度视力。
