Bailie Maura, Wolffsohn James Stuart, Stevenson Michael, Jackson A Jonathan
Faculty of Life and Health Sciences, University of Ulster, Coleraine, Northern Ireland.
Clin Exp Optom. 2013 Sep;96(5):450-4. doi: 10.1111/cxo.12031. Epub 2013 Mar 8.
The aim was to investigate the visual effect of coloured filters compared to transmission-matched neutral density filters, in patients with dry age-related macular degeneration.
Visual acuity (VA, logMAR), contrast sensitivity (Pelli-Robson) and colour vision (D15) were recorded for 39 patients (average age 79.1 ± 7.2 years) with age-related macular degeneration, both in the presence and absence of glare from a fluorescent source. Patients then chose their preferred coloured and matched neutral density transmission filters (NoIR). Visual function tests were repeated with the chosen filters, both in the presence and absence of glare from the fluorescent source. Patients trialled the two filters for two weeks each, in random order. Following the trial of each filter, a telephone questionnaire was completed.
VA and contrast sensitivity were unaffected by the coloured filters but reduced through the neutral density filters (p < 0.01). VA and contrast sensitivity were reduced by similar amounts, following the introduction of the glare source, both in the presence and absence of filters (p < 0.001). Colour vision error scores were increased following the introduction of a neutral density filter (from 177.6 ± 60.2 to 251.9 ± 115.2) and still further through coloured filters (275.1 ± 50.8; p < 0.001). In the absence of any filter, colour vision error scores increased by 29.1 ± 55.60 units in the presence of glare (F2,107 = 3.9, p = 0.02); however, there was little change in colour vision error scores, in the presence of glare, with either the neutral density or coloured filters. Questionnaires indicated that patients tended to gain more benefit from the coloured filters.
Coloured filters had minimal impact on VA and contrast sensitivity in patients with age-related macular degeneration; however, they caused a small reduction in objective colour vision, although this was not registered subjectively by patients. Patients indicated that they received more benefit from the coloured filters compared with neutral density filters.
目的是研究与透射匹配的中性密度滤光片相比，彩色滤光片对干性年龄相关性黄斑变性患者的视觉效果。
记录了39例年龄相关性黄斑变性患者（平均年龄79.1±7.2岁）在有和没有荧光光源眩光情况下的视力（VA，logMAR）、对比敏感度（佩利-罗布森）和色觉（D15）。然后患者选择他们喜欢的彩色和匹配的中性密度透射滤光片（NoIR）。在有和没有荧光光源眩光的情况下，使用所选滤光片重复进行视觉功能测试。患者以随机顺序对两种滤光片各试用两周。在试用每种滤光片后，完成一份电话调查问卷。
彩色滤光片对视力和对比敏感度没有影响，但中性密度滤光片会使其降低（p<0.01）。在有和没有滤光片的情况下，引入眩光光源后，视力和对比敏感度降低的幅度相似（p<0.001）。引入中性密度滤光片后色觉误差分数增加（从177.6±60.2增加到251.9±115.2），通过彩色滤光片时增加得更多（275.1±50.8；p<0.001）。在没有任何滤光片的情况下，有眩光时色觉误差分数增加29.1±55.60单位（F2,107 = 3.9，p = 0.02）；然而，在有眩光的情况下，使用中性密度滤光片或彩色滤光片时色觉误差分数变化很小。调查问卷表明患者倾向于从彩色滤光片中获得更多益处。
彩色滤光片对年龄相关性黄斑变性患者的视力和对比敏感度影响最小；然而，它们会使客观色觉略有下降，尽管患者主观上并未察觉到。患者表示与中性密度滤光片相比，他们从彩色滤光片中获得了更多益处。
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