Cortical visual impairment (CVI) is a form of visual impairment that is caused by a brain problem rather than an eye problem. (The latter is sometimes termed "ocular visual impairment" when discussed in contrast to cortical visual impairment.) Some people have both CVI and a form of ocular visual impairment.CVI is also sometimes known as cortical blindness, although most people with CVI are not totally blind.

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dbo:abstract
  • Cerebrale visuele inperking (CVI), (Engels, Cerebral visual impairment), is een gebrek aan beeldverwerkingscapaciteit in de hersenen.CVI kan veroorzaakt worden door een zuurstoftekort tijdens of vlak na de geboorte. Daarbij treedt dan beschadiging op van de neurologische paden waarover de beeldverwerking plaatsvindt. In grote lijnen zijn er twee belangrijke paden te onderscheiden, de dorsale en de ventrale stroom.Normaal gesproken wordt voor de beeldverwerking de informatie in een aantal verschillende stromen gesplitst. De ene stroom houdt zich bezig met "wat" iets is, de andere stroom met "waar" iets is. Beschadigingen aan de dorsale stroom leiden tot problemen met de bepaling van het "waar". Beschadigingen aan de ventrale stroom leiden tot problemen met het "wat", maar ook met gezichtsherkenning en dus met "wie".
  • 神經性視損傷(NVI)又稱為皮層性視損傷(CVI),是一種主要因腦部受損(而不是因為眼睛本身受損)而導致的視覺障礙。
  • Deficiência visual cortical (DVC) é uma forma de deficiência visual causada por um problema cerebral mais que um problema no olho (deficiência ocular). Algumas pessoas possuem tanto deficiência visual cortical quanto uma deficiência ocular.A DVC é chamada algumas vezes de cegueira cortical, embora muitas pessoas com DVC não sejam totalmente cegas. O termo deficiência visual neurológica abrange tanto a DVC quanto a cegueira cortical total. A maturação visual atrasada, outra forma de deficiência visual neurológica é similar à DVC, exceto que as dificuldades da criança portadora são resolvidas em poucos meses. Embora a visão de uma pessoa com DVC possa mudar, raramente se torna totalmente normal.As maiores causas são: Asfixia, hipoxia (oxigênio insuficiente nas hemácias) ou isquemia (sangue insuficiente no cérebro), que podem ocorrer durante o processo de nascimento; defeitos no desenvolvimento cerebral]; contusões na cabeça; hidrocefalia (quando o fluido cerebroespinal não circula apropriadamente no entorno de cérebro e acumula-se na cabeça, provocando pressão no cérebro); pancada envolvendo o lobo occipital e infeções do sistema nervoso central, como meningite e encefalite.
  • Cortical visual impairment (CVI) is a form of visual impairment that is caused by a brain problem rather than an eye problem. (The latter is sometimes termed "ocular visual impairment" when discussed in contrast to cortical visual impairment.) Some people have both CVI and a form of ocular visual impairment.CVI is also sometimes known as cortical blindness, although most people with CVI are not totally blind. The term neurological visual impairment (NVI) covers both CVI and total cortical blindness. Delayed visual maturation, another form of NVI, is similar to CVI, except the child's visual difficulties resolve in a few months. Though the vision of a person with CVI may change, it rarely if ever becomes totally normal.The major causes of CVI are as follows: asphyxia, hypoxia (a lack of sufficient oxygen in the body’s blood cells), or ischemia (not enough blood supply to the brain), all of which may occur during the birth process; developmental brain defects; head injury; hydrocephalus (when the cerebrospinal fluid does not circulate properly around the brain, and collects in the head, putting pressure on the brain); a stroke involving the occipital lobe; and infections of the central nervous system, such as meningitis and encephalitis.
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  • 神經性視損傷(NVI)又稱為皮層性視損傷(CVI),是一種主要因腦部受損(而不是因為眼睛本身受損)而導致的視覺障礙。
  • Cerebrale visuele inperking (CVI), (Engels, Cerebral visual impairment), is een gebrek aan beeldverwerkingscapaciteit in de hersenen.CVI kan veroorzaakt worden door een zuurstoftekort tijdens of vlak na de geboorte. Daarbij treedt dan beschadiging op van de neurologische paden waarover de beeldverwerking plaatsvindt.
  • Deficiência visual cortical (DVC) é uma forma de deficiência visual causada por um problema cerebral mais que um problema no olho (deficiência ocular). Algumas pessoas possuem tanto deficiência visual cortical quanto uma deficiência ocular.A DVC é chamada algumas vezes de cegueira cortical, embora muitas pessoas com DVC não sejam totalmente cegas. O termo deficiência visual neurológica abrange tanto a DVC quanto a cegueira cortical total.
  • Cortical visual impairment (CVI) is a form of visual impairment that is caused by a brain problem rather than an eye problem. (The latter is sometimes termed "ocular visual impairment" when discussed in contrast to cortical visual impairment.) Some people have both CVI and a form of ocular visual impairment.CVI is also sometimes known as cortical blindness, although most people with CVI are not totally blind.
rdfs:label
  • Cerebrale visuele inperking
  • 皮层性视损伤
  • Deficiência visual cortical
  • Cortical visual impairment
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