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首页> 外文期刊>Journal of vision >Visual exploration of objects and scenes in people with Stargardt disease and macular degeneration
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Visual exploration of objects and scenes in people with Stargardt disease and macular degeneration

机译：视觉观察Stargardt病和黄斑变性患者的物体和场景

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Introduction: Lesions of the macula result in loss of central vision and a dependence on low resolution peripheral vision. Most studies in people with central field loss have focused on reading which constitutes the main complaint of patients, though questionnaires of quality of life indicate impairments in daily living activities. Some studies have also reported impairments in face and in object detection or recognition tasks. Little is known about how people with central visual field loss explore realistic images. Methods: We recorded eye movements (scan paths, saccades and fixations) and naming times in patients with juvenile maculopathy (Stargardt disease, mean acuity 1/20), in patients with age related macular degeneration (AMD mean acuity 2.6/10) and in normally sighted age-matched controls (mean acuity 9.1/10). Colored photographs (32.5 X 25.8?° of visual angle) of isolated objects, of natural scenes and of objects in scenes were centrally displayed for 2 sec. Eye movements were recorded with an eye tracker (SMI). Results: On average naming accuracy was higher by 30% for controls than for both AMD and Stargardt patients. This difference was equivalent for isolated objects and for objects in scenes. The proportion of fixations in regions of interest was lower in people with maculopathy than in controls. The number of saccades was larger for AMD patients than for Stargardt patients and for controls. Discussion: The results suggest that an abnormal pattern of visual exploration might contribute to deficits in object and scene recognition in both people with Stargardt disease and AMD.
机译：简介：黄斑病变会导致中央视力丧失和对低分辨率周边视力的依赖性。尽管生活质量调查表显示日常生活活动受到损害，但大多数针对中枢性视野丧失患者的研究都集中于阅读，这是患者的主要诉求。一些研究还报告了面部和物体检测或识别任务的损伤。关于中央视野丧失的人们如何探索逼真的图像知之甚少。方法：我们记录了青少年黄斑病变（Stargardt病，平均视力1/20），年龄相关性黄斑变性（AMD平均视力2.6 / 10）和视黄斑病变患者的眼球运动（扫描路径，扫视和注视）和命名时间。通常为与年龄相匹配的对照（平均视力9.1 / 10）。集中显示孤立物体，自然场景和场景中物体的彩色照片（视角的32.5 X 25.8？°）集中显示2秒钟。使用眼动仪（SMI）记录眼动。结果：与AMD和Stargardt患者相比，对照的平均命名准确率高出30％。对于隔离的对象和场景中的对象，此差异相同。黄斑病变患者感兴趣区域的注视比例低于对照组。 AMD患者的扫视次数比Stargardt患者和对照大。讨论：结果表明，患有Stargardt病和AMD的人，视觉探索的异常模式可能导致对象和场景识别的缺陷。

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