Vision Examination of Patients with Neurological Disease and Injury

Suter, Penelope S.; Harvey, Lisa H.

doi:10.1201/b10524-13

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…The VEP has long been used as a clinical tool to determine if the primary afferent visual pathway is intact, as well as to assess an individual’s visual acuity [2,3,4]. Using high-contrast pattern-reversal stimuli, which consist of a black-and-white checkerboard pattern changing phase with constant mean luminance, the pattern VEP produces low variability of waveform both within an individual subject and across subjects [1].…”

Section: Introductionmentioning

confidence: 99%

Objective assessment of the human visual attentional state

et al. 2012

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Primary objective The purpose of this study was to develop an objective way to assess human visual attention using the alpha band component of the visual-evoked potential (VEP). Design and methods Six different attentional conditions were tested: eyes-open, eyes-closed, eyes-closed with backwards number counting, and three rapid serial visual presentation (RSVP) tasks. 18 visually-normal, young-adult subjects (ages 21 to 28 years) were tested binocularly at 1 meter for each condition on two separate days. The Diopsys™ NOVA-TR system was used to obtain the visual-evoked potential (VEP) and extracted alpha-wave and its related power spectrum. Additionally, the Visual Search and Attention Test (VSAT) was administered as a subjective measure of visual attention. Results Subjects exhibited significant decreases in power in the alpha band when comparing the eyes-closed to the eyes-open conditions, with power in the eyes-closed condition being, on average, twice as large. The response from the other four conditions did not reflect the differential attentional demands. The ratio of the power in the eyes-closed condition to the eyes open condition in the lower alpha frequencies (8–10 Hz) was found to be significantly correlated to the group’s performance on the VSAT, especially the 10 Hz component. Conclusions An individual’s ability to attenuate their alpha-component during visual processing may be a predictor of their visual attentional state. These findings solidify the role of the VEP alpha subcomponent as an objective electrophysiological correlate of visual attention, which may be useful in the diagnosis and treatment of human visual-attention disorders in the future.

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Section: Introductionmentioning

confidence: 99%

Objective assessment of the human visual attentional state

et al. 2012

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“…Living with good vision is an integral part of many important life experiences, such as, education, employment, and social interaction (Kuyk et al, 2008; Politzer, 2013; Stelmack, 2001). Therefore, losing the sense of sight is often most feared sensory loss (Baker & Winyard, 1998; De Leo et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Psychological changes among working-age adults with acquired vision impairment: The need for psychological intervention?

Bassey

Ellison

2020

British Journal of Visual Impairment

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This study investigates the psychological impacts of acquiring a vision impairment during working-age phase of adulthood and the potential negative effect on participation in community activities were highlighted. Adopting a qualitative and interpretive phenomenological approach, eight semi-structured in-depth interviews were conducted with eight adult users of vision rehabilitation services. Three broad themes were identified: (1) reduced participation in education, employment, and community activities, (2) feelings of hopelessness and depression from vision loss, and (3) psychological adjustment to vision loss over time. Findings are discussed in the context of the international literature, and recommendations that may enhance the vision rehabilitation services are made.

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Vision Examination of Patients with Neurological Disease and Injury

Cited by 2 publications

References 7 publications

Objective assessment of the human visual attentional state

Objective assessment of the human visual attentional state

Psychological changes among working-age adults with acquired vision impairment: The need for psychological intervention?

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