A Case of Blindsight to Sight.
Introduction: Visual consciousness is affected when the primary visual cortex is damaged. However, sighted behavior can persist within the areas of cortical blindness. This phenomenon is called blindsight, and it describes the ability to respond to visual stimuli in the absence of conscious awarenes...
| Publicado en: | Optometry & Visual Performance Vol. 5; no. 5; pp. 184 - 189 |
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| Autor principal: | |
| Formato: | case study tables/charts Journal Article |
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Optometric Extension Program
Nov2017
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=127007561&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 127007561 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 23253479 HOOW jtl: Optometry & Visual Performance issn: 23253479 maglogo: N pubinfo: dt: Nov2017 vid: 5 iid: 5 pid: 46881 pub: Optometric Extension Program place: Lutherville Timonium, Maryland artinfo: ui: 127007561 127007561 127007561 127007561 ppf: 184 ppct: 5 formats: tig: atl: A Case of Blindsight to Sight. aug: au: Chan, Adrienne affil: OD, Chicago, Illinois Vision Therapy and Low Vision Rehabilitation, SCO 2016-17 sug: subj: Vision Physiology Visual Fields Cerebral Cortex Blindness Diagnosis Visual Acuity Evaluation Visual Perception Female Aged Psychomotor Performance Rehabilitation Eye Care Methods Aged: 65+ years Female ab: Introduction: Visual consciousness is affected when the primary visual cortex is damaged. However, sighted behavior can persist within the areas of cortical blindness. This phenomenon is called blindsight, and it describes the ability to respond to visual stimuli in the absence of conscious awareness. With practice, visual awareness within a blind field can be trained through repeated visual stimulation. Case Report: A 70-year-old female with blindsight presented for a visual skills evaluation following a left-sided ischemic stroke. She perceived light in only very limited areas of her visual field, yet she was able accurately to identify colors, orientation, and the location of various visual targets presented in her blind field. Vision therapy was initiated to maximize the use of her residual vision, as well as to improve overall visual awareness. Within two months of starting therapy, her vision improved to 20/100 in the right eye and 20/125 in the left eye with near normal visual fields. Conclusions: With practice, responses to visual stimuli within the blind field can improve, perceptual learning can occur over time, and awareness can be trained. Rehabilitation of individuals with blindsight is highly recommended as it may present some therapeutic value as well as rehabilitative. pubtype: Academic Journal doctype: case study tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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