Consistency of preferred retinal locus across tasks and participants trained with a simulated scotoma.
Consistency of preferred retinal locus across tasks and participants trained with a simulated scotoma.
复制标题
不同任务和使用模拟暗点训练的参与者的首选视网膜位点的一致性。
DOI：
10.1016/j.visres.2022.108158
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发表时间：
2023
期刊：
影响因子：
1.8
通讯作者：
Seitz,AaronR
中科院分区：
文献类型：
--
作者：
Maniglia,Marcello;Visscher,KristinaM;Seitz,AaronR
在视网膜病变（例如黄斑变性（MD））后中心视力丧失后，患者通常采取补偿策略，包括发展“优选视网膜位点”（PRL）以在涉及注视的任务中替换中央凹。一个关键的问题是，患者是否开发多用途PRL，或者他们的眼科策略是否适应任务的要求。虽然大多数MD患者会产生一种PRL，但临床证据表明，患者可能会产生多种PRL，并根据手头的任务在它们之间切换。为了理解这一点，我们检查了正常视力个体的中心视力丧失模型，并测试了他们在训练后是否在任务中使用相同或不同的PRL。19名参与者接受了10次对比度检测培训，同时处于凝视条件下，模拟中心视力丧失。训练前后，在测量视力、阅读能力和视觉搜索的任务中评估周边寻找策略。为了量化这些不同的自然任务中的策略，我们测量并比较了参与者执行任务时8个等距周边位置中每个位置的任务相关信息量。结果表明，一些参与者在任务中使用一致的观看策略，而其他参与者的策略则因任务而异。这种新方法允许量化周边视觉使用，即使在相对生态的任务。这些结果代表了在模拟视力丧失中跨任务的外围观看策略的第一次检查之一。结果表明，在模拟中心视力丧失后，周边寻找策略的个体差异可能是病理性视力丧失的模型。
After loss of central vision following retinal pathologies such as macular degeneration (MD), patients often adopt compensatory strategies including developing a “preferred retinal locus” (PRL) to replace the fovea in tasks involving fixation. A key question is whether patients develop multi-purpose PRLs or whether their oculomotor strategies adapt to the demands of the task. While most MD patients develop a PRL, clinical evidence suggests that patients may develop multiple PRLs and switch between them according to the task at hand. To understand this, we examined a model of central vision loss in normally seeing individuals and tested whether they used the same or different PRLs across tasks after training. Nineteen participants trained for 10 sessions on contrast detection while in conditions of gaze-contingent, simulated central vision loss. Before and after training, peripheral looking strategies were evaluated during tasks measuring visual acuity, reading abilities and visual search. To quantify strategies in these disparate, naturalistic tasks, we measured and compared the amount of task-relevant information at each of 8 equally spaced, peripheral locations, while participants performed the tasks. Results showed that some participants used consistent viewing strategies across tasks whereas other participants’ strategies differed depending on task. This novel method allows quantification of peripheral vision use even in relatively ecological tasks. These results represent one of the first examinations of peripheral viewing strategies across tasks in simulated vision loss. Results suggest that individual differences in peripheral looking strategies following simulated central vision loss may model those developed in pathological vision loss.