Adaptation to Visual Field Defects with Virtual Reality Scotoma in Healthy Subjects

Zangemeister, Wolfgang H.; Oechsner, Ulrich

doi:10.1007/978-1-4757-3054-8_12

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…this shift brings the visual information from the blind hemifield into the seeing hemifield for further processing. Patients learn, therefore, to efficiently use their eyes "to keep the 'blind side' in sight", 75 which enables them to regain adequate reading (or visual exploration) performance. visual field enlargement has occasionally been observed after compensatory oculo motor training, 10,76,77 although the alteration to the visual field alone cannot account for the observed improvements, which can be attributed largely to training-induced, efficient oculomotor adaptation to visual field loss.…”

Section: Original Textmentioning

confidence: 99%

The rehabilitation of hemianopic dyslexia

Schuett

2009

Nat Rev Neurol

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Hemianopic dyslexia is a frequent and disabling functional impairment following brain injury. This form of dyslexia is an acquired reading disorder whereby patients with homonymous visual field defects have persistent and severe reading difficulties, despite having intact language functions. Hemianopic dyslexia has received little attention from researchers and clinicians, and this article is the first to review the rehabilitation of patients with the condition. In light of advances in our knowledge about the nature and causes of hemianopic dyslexia, I critically examine the available treatment methods for visual field disorders and evaluate their efficiency in alleviating hemianopic dyslexia. On the basis of the reviewed evidence, I suggest that compensatory therapies, which attempt to reorganize eye-movement control, are superior to restorative therapies, which aim at visual field restitution. For the rehabilitation of hemianopic dyslexia, I recommend a treatment protocol that involves the systematic and repetitive practice of specific eye movements for reading. Despite increasing evidence for the effectiveness of this treatment protocol, which has clinically relevant long-term benefits, the underlying mechanism of the therapeutic effect is still unclear. Indeed, more research is required to further improve the efficiency of rehabilitation in patients with hemianopic dyslexia.

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Section: Original Textmentioning

confidence: 99%

The rehabilitation of hemianopic dyslexia

Schuett

2009

Nat Rev Neurol

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“…These studies use passive gaze-contingent applications that take the gaze input to simulate low vision on a display that continuously updates where the subject is looking. Extensive studies showed that normal subjects develop similar visual strategies to adapt to low vision as patients do (Bertera 1992;Zangemeister and Oechsner, 1999;Kwon et al, 2013;Walsh and Liu, 2014;Geringswald and Pollmann, 2015;Barraza-Bernal et al, 2017a;Barraza-Bernal et al, 2017b) and can be used to study their impact (Barraza-Bernal et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Eye-tracking for low vision with virtual reality (VR): testing status quo usability of the HTC Vive Pro Eye

Sipatchin

Wahl

Rifai

2020

Preprint

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BackgroundAdding an eye tracker inside a head-mounted display (HMD) can offer a variety of novel functions in virtual reality (VR). Promising results point towards its usability as a flexible and interactive tool for low vision assessments and research of low vision functional impairment. Visual field (VF) perimetry performed using VR methodologies evidenced a correlation between the reliability of visual field testing in VR and the Humphrey test. The simulation of visual loss in VR is a powerful method used to investigate the impact and the adaptation to visual diseases. The present study presents a preliminary assessment of the HTC Vive Pro Eye for its potential use for these applications.MethodsWe investigated data quality over a wide visual field and tested the effect of head motion. An objective direct end-to-end temporal precision test simulated two different scenarios: the appearance of a pupil inside the eye tracker and a shift in pupil position, known as artificial saccade generator. The technique is low-cost thanks to a Raspberry Pi system and automatic.ResultsThe target position on the screen and the head movement limit the HTC Vive Pro Eye’s usability. All the simulated scenarios showed a system’s latency of 58.1 milliseconds (ms).ConclusionThese results point towards limitations and improvements of the HTC Vive Pro Eye’s status quo for visual loss simulation scenarios and visual perimetry testing.

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Scanpath Eye Movements during Visual Mental Imagery in a Simulated Hemianopia Paradigm

Liman

Zangemeister

2012

JEMR

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Several studies have shown that eye movements (EM) are functionally involved in visual imagery. In this study we investigate the impact of a simulated homonymous hemianopia paradigm (SH) with and without foveal masking on scanpath eye movements during visual mental imagery. EM of twenty subjects were recorded under SH condition during viewing and subsequent visual imagery of complex pictures. Using evaluated string editing methods viewing and imagery scanpaths were compared. Our results show that scanpath EM are involved in visual mental imagery and reflect the picture content even under SH. In contrast, additional foveal masking significantly reduces the similarity between viewing and imagery scanpath. This points toward a detrimental effect of foveal masking on subsequent visual imagery performance.

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Adaptation to Visual Field Defects with Virtual Reality Scotoma in Healthy Subjects

Cited by 3 publications

References 4 publications

The rehabilitation of hemianopic dyslexia

The rehabilitation of hemianopic dyslexia

Eye-tracking for low vision with virtual reality (VR): testing status quo usability of the HTC Vive Pro Eye

Scanpath Eye Movements during Visual Mental Imagery in a Simulated Hemianopia Paradigm

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