Real-world applications in vision and attention: How to help patients find their (golf) balls again

Ellison, Amanda; Dunne, Stephen; Lane, Alison R.

doi:10.1016/bs.pbr.2020.04.003

Cited by 1 publication

(2 citation statements)

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“…Given that people typically make ~3 saccades every second, one implication of our data is that, under normal viewing conditions, hemianopes may have functional impairment that extends from their blind field into the endpoint of a saccade in the good field, and which would go undetected by standard measures of visual function in which fixation is enforced. This ipsilateral functional impairment during eye-movements may help explain why hemianopia is so resistant to rehabilitation, and why transfer from successful lab-based interventions to real-world improvements in visual ability has been so hard to achieve [ 21 , 26 , 27 ].…”

Section: Discussionmentioning

confidence: 99%

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A presaccadic perceptual impairment at the postsaccadic location of the blindspot

Smith,

Beierholm,

Avery

2023

PLoS ONE

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Saccadic eye movements are preceded by profound changes in visual perception. These changes have been linked to the phenomenon of ‘forward remapping’, in which cells begin to respond to stimuli that appear in their post-saccadic receptive field before the eye has moved. Few studies have examined the perceptual consequences of remapping of areas of impaired sensory acuity, such as the blindspot. Understanding the perceptual consequences of remapping of scotomas may produce important insights into why some neurovisual deficits, such as hemianopia are so intractable for rehabilitation. The current study took advantage of a naturally occurring scotoma in healthy participants (the blindspot) to examine pre-saccadic perception at the upcoming location of the blindspot. Participants viewed stimuli monocularly and were required to make stimulus-driven vertical eye-movements. At a variable latency between the onset of saccade target (ST) and saccade execution a discrimination target (DT) was presented at one of 4 possible locations; within the blindspot, contralateral to the blindspot, in post-saccadic location of the blindspot and contralateral to the post-saccadic location of the blindspot. There was a significant perceptual impairment at the post-saccadic location of the blindspot relative to the contralateral post-saccadic location of the blindspot and the post-saccadic location of the blindspot in a no-saccade control condition. These data are consistent with the idea that the visual system includes a representation of the blindspot which is remapped prior to saccade onset.

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Section: Discussionmentioning

confidence: 99%

“…Eight participants (4 female, 8 right-eyed, ages[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] were recruited from Durham University during the 2016/2017 academic year. All participants gave informed written consent.…”

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confidence: 99%