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相关概念视频

Visual Agnosia01:12

Visual Agnosia

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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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相关实验视频

Updated: Jan 9, 2026

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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使用连续视觉刺激跟踪来检测由于获得性脑损伤导致的视觉功能损失.

A C L Vrijling1,2, M J de Boer1, R J Renken3

  • 1Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.

Acta ophthalmologica
|December 6, 2025
PubMed
概括

基于SONDA的眼动周边测量 (SONDA-EMP) 在获得性脑损伤 (ABI) 患者中有效检测视野损失. 这种新方法量化了视觉功能损失,并没有显示学习效应.

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科学领域:

  • 眼科医生 眼科 眼科
  • 神经科学是一个神经科学.
  • 医疗技术 医疗技术 医学技术

背景情况:

  • 获得性脑损伤 (ABI) 可以导致同名的视野 (VF) 缺陷.
  • 标准自动周边测量 (SAP) 是VF评估的黄金标准,但对ABI患者来说可能具有挑战性.
  • SONDA (标准化眼运动和神经障碍评估) 通过跟踪移动的刺激提供了一个简化的周边任务.

研究的目的:

  • 评估基于SONDA的眼动周边测量 (SONDA-EMP) 是否可以检测同名VF缺陷患者的视觉功能损失.
  • 确定SONDA-EMP是否可以量化视觉功能损失,与SAP平均灵敏度 (MS) 相对应.
  • 评估SONDA-EMP性能中的学习效应.

主要方法:

  • 对16名单边ABI患者的跟踪性能进行了评估,并与36名对照组进行了比较.
  • 参与者单眼追踪一个移动的刺激 (戈德曼尺寸III) 在三个韦伯对比度 (40%,160%,640%) 而眼睛的运动被记录.
  • SONDA-EMP测量了视线与刺激位置之间的一致性.

主要成果:

  • 与所有对比度的对照组相比,ABI患者的追踪性能显著下降 (p < 0.0001).
  • 追踪性能从40%提高到160%的对比度 (p < 0.0001),但没有进一步.
  • SAP MS 显示了 160% 和 640% 的对比度跟踪性能与中度至强度的相关性 (r=0.73,p=0.01;r=0.67,p=0.004).

结论:

  • SONDA-EMP能够检测由ABI引起的视觉功能损失.
  • 在SONDA-EMP中,跟踪性能降低的程度取决于视野损失的程度.
  • 在重复的SONDA-EMP测试中没有观察到显著的学习效应.