使用视觉搜索测量对比度增加和减少处理在已确定的青光眼中
Vanessa Thien Sze Tang1,2, Andrew Turpin2,3, William Huxley Morgan2,4
1Department of Optometry and Vision Science, School of Allied Health, The University of Western Australia, Perth, Western Australia, Australia.
概括
这项研究发现,随着视野损失的进展,光瘤患者的视觉通路的开启和关闭都显示出类似的性能下降. 晚期玻璃眼和中部视力丧失对这两种途径的响应时间显著减慢.
科学领域:
- 眼科医生 眼科 眼科
- 神经科学是一个神经科学.
- 视觉科学 视觉科学
背景情况:
- 视觉处理依赖于启动和关闭视网膜质细胞 (RGCs) 来获得明暗信息.
- 实验性玻璃眼模型表明,OFF RGCs具有选择性的脆弱性.
- 这项研究调查了人类玻璃眼的差异性通路性能.
研究的目的:
- 为了确定视觉通路的开启和关闭是否表现出不同速度的性能下降,而视觉场的严重程度在绿眼中增加.
- 评估青光眼严重程度和视野损失模式对视觉处理速度的影响.
主要方法:
- 106名患有青光眼的参与者在iPad上执行了视觉搜索任务.
- 测量了对比度增加和减少的响应时间.
- 使用标准周边测量 (指南针周边测量,ZEST-Fast策略) 来评估视野.
主要成果:
- 较慢的响应时间与较大的视野损失相关.
- 开启和关闭通路的响应时间随着视野平均偏差的恶化,以相似的速度下降.
- 与中央节省缺陷相比,对ON和OFF刺激的中心视野损失与显著较慢的响应时间有关.
结论:
- 这些发现不支持在人类绿眼中选择性OFF RGC损失.
- 青光眼的严重程度和中部视力丧失明显影响视觉处理速度.
- 无论是ON还是OFF路径,都显示出在晚期青光瘤中同等的性能降低.
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