Visual learning and attention guidance in patients with macular degeneration

黄斑变性患者的视觉学习和注意力指导

• 批准号: 230250807
• 负责人: Professor Dr. Stefan Pollmann
• 金额: --
• 依托单位: Universitätsaugenklinik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/230250807?language=en
• 关键词: Visual; learning; attention; guidance; patients

In the first project period, we have investigated the impact of foveal vision loss on visual memory and memory-guided visual search. We found that both are deficient after foveal vision loss, but only as long as the visual exploration of the environment with eye movements is impaired. Especially in the early phase of foveal vision loss (or with simulated foveal vision loss in normal-sighted observers), exploration suffers from the fact that the fovea is the reference point for saccade planning. This means that saccades bring peripheral stimuli right into the scotomatous area, making corrective saccades necessary. This changes the normally effortless exploration of the environment into a very much top-down controlled task. Consequently, we now propose to develop an efficient saccadic rereferencing training to a retinal location outside the scotoma. We then want to test if normalization of gaze exploration goes along with improvements of memory-guided search in the presence of foveal vision loss.

在第一个项目期间，我们研究了中央凹视力丧失对视觉记忆和记忆引导的视觉搜索的影响。我们发现，这两个都是缺乏后，中央凹视力丧失，但只要视觉探索的环境与眼球运动受损。特别是在中央凹视力丧失的早期阶段（或在正常视力的观察者中具有模拟的中央凹视力丧失），探索受到中央凹是扫视规划的参考点的事实的影响。这意味着扫视将外围刺激直接带入暗点区域，使得校正扫视是必要的。这将通常毫不费力的环境探索变成了一个非常自上而下的控制任务。因此，我们现在建议开发一种有效的扫视重参照训练到暗点之外的视网膜位置。然后，我们想测试注视探索的正常化是否与存在中心凹视力丧失的记忆引导搜索的改善一起沿着。