渗出型老年性黄斑变性患者光动力疗法治疗前后视功能变化

目的 观察渗出型老年性黄斑变性（AMD）患者光动力疗法（PDT） 治疗前后的视功能变化。 方法 对经临床眼底检查、荧光素眼底血管造影（FFA）、吲哚青绿血管造影（ICGA）和光相干断层扫描（OCT）检查确诊的AMD患者25例34只眼采取PDT治疗，治疗后随访4个月～2年，平均随访观察时间9.2个月。对比分析治疗前以及治疗后定期随诊观察的最佳视力［采用最小分辨角度的对数视力(logMRA)统计平均视力］、视物变形及中心暗点、对比敏感度、双眼单视功能和立体视功能、以及色觉辨认等的变化情况。 结果 PDT治疗前患眼平均视力为logMAR 0.73±0. 37，治疗后不同时期的平均视力较治疗前提高，尤其在3个月时较明显，其平均视力logMAR 0.59±0.45。治疗前后比较，差异无显著性的意义（P＞0.05）；其中视力提高者13只眼 ，占38.24%；无变化15只眼，占44.12%；下降6只眼，占17.65%。Amsler方格表检查视物变形和中心暗点均较治疗前范围缩小，但差异无显著性的意义（P＞0.05）。治疗后各频区的对比敏感度值均较治疗前呈现不同程度提高，低频区（1.5 c/d）差异有显著性的意义（P＜0.05） 。患者的双眼同时视功能、融合功能、立体视功能以及色觉辨认功能均较治疗前有轻度改善 （P＞0.05）。 结论 渗出型AMD患者的视功能变化是多方面的，PDT 治疗可改善患者的部分视功能. （中华眼底病杂志，2004，20：289-291）

Visual function before and after photodynamic therapy of subfoveal choroidal neovascularization in age-related macular degeneration

Objective To evaluate the visual function before and after photodynamic therapy(PDT) in patients with subfoveal choroidal neovascularization (CNV) caused by age-related macular degeneration (AMD). Methods Twenty-five consecutive patients (34 eyes) treated with PDT (verteporfin) for subfoveal CNV in age-related macular degeneration diagnosed by fluorescein angiography (FFA), indocyanine green angiography (ICGA) and optical coherence tomography (OCT). Visual function including best corrected visual acuity, contrast sensitivity frequency, binocular function, confusion, stereo-vision, color vision, metamorphopsis and central scotoma were examed before photodynamic therapy and 1 week, 1 month, 3 month after photodynamic therapy. The follow-up time varied from 3 months to 2 years (mean 7.6 months). Results The changes of visual function at the 3rd month after photodynamic therapy revealed improving in 13 eyes (38.24%), without any change in 17 eyes (50.00%), and decreasing in 6 eyes (17.65%). Visual acuity with logMRA improved after photodynamic therapy, but without statistic difference. All spatial contrast sensitivity improved. Contrast sensitivity for spatial frequencies 5 cycles per degree (cpd) was better after photodynamic therapy with significant difference (P=0.045).Binocular function, fusion function, stereo function and color vision were slightly improved without statistic difference. Conclusion Damage of visual function in macular degeneration is many-sided. The treatment of PDT for exudative AMD can improve part visual function.