Rehabilitation regimes based upon psychophysical studies of prosthetic vision
Rehabilitation regimes based upon psychophysical studies of prosthetic vision
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DOI：
10.1088/1741-2560/6/3/035009
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发表时间：
2009-06-01
影响因子：
4
通讯作者：
Lovell, N. H.
中科院分区：
文献类型：
--
作者：
Chen, S. C.;Suaning, G. J.;Lovell, N. H.
原型视觉假体的人体试验已经成功地在因视网膜色素变性和年龄相关性黄斑变性而失明的植入物接受者的视野中引起视觉感知（光幻视）。研究人员正在朝着一种利用单个光幻视作为组成视觉场景的基本构件的设备迅速发展。在短期内，这种形式的假体视觉预计具有低分辨率、大的光幻视间间隙、光幻视的扭曲空间分布、受限的视场、偏心定位的光幻视场和有限数量的可表达亮度水平。为了充分发挥这些设备的潜力，需要有一个培训和康复计划，其目的是帮助假肢接受者理解他们所看到的，并调整他们的观看习惯，以优化设备的性能。基于模拟和真实的假肢视觉的心理物理学研究文献。本文为假肢接受者提出了一个综合的理论训练方案：视觉搜索、视觉敏锐度、阅读、面部/物体识别、手眼协调和导航。这些任务的目的是训练接受者进行视觉扫描，偏心观看和阅读，辨别低对比度的视觉信息，并协调身体动作的视觉引导下的假肢视觉任务。这些技能已被确定为发挥重要作用，使假肢视觉功能的日常活动，他们的收件人。
Human trials of prototype Visual prostheses have successfully elicited Visual percepts (phosphenes) in the Visual field of implant recipients blinded through retinitis pigmentosa and age-related macular degeneration. Researchers are progressing rapidly towards a device that utilizes individual phosphenes as the elementary building blocks to compose a Visual scene. This form of prosthetic vision is expected, in the near term, to have low resolution, large inter-phosphene gaps, distorted spatial distribution of phosphenes, restricted field of view, an eccentrically located phosphene field and limited number of expressible luminance levels. In order to fully realize the potential of these devices, there needs to be a training and rehabilitation program which aims, to assist the prosthesis recipients to understand what they are seeing, and also to adapt their viewing habits to optimize the performance of the device. Based on the literature of psychophysical studies in simulated and real prosthetic vision. this paper proposes a comprehensive, theoretical training regime for a prosthesis recipient: visual search, Visual acuity, reading, face/object recognition, hand-eye coordination and navigation. The aim of these tasks is to train the recipients to conduct Visual scanning, eccentric viewing and reading, discerning low-contrast visual information, and coordinating bodily actions for visual-guided tasks under prosthetic vision. These skills have been identified as playing an important role in making prosthetic vision functional for the daily activities of their recipients.