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</topic><topic id="https://vocabulario.abcd.usp.br/pt-br/?tema=31887"><instanceOf><topicRef xlink:href="#term"/></instanceOf><baseName><baseNameString>DOENÇAS DO NERVO ÓPTICO</baseNameString></baseName>  <occurrence>    <instanceOf>      <topicRef xlink:href="#scope-note"/>    </instanceOf><baseName><baseNameString><![CDATA[ Doenças que produzem lesão ou disfunção do segundo nervo craniano ou nervo óptico, que geralmente é considerado um componente do sistema nervoso central. Danos às fibras do nervo óptico podem ocorrer na retina ou próximo a sua origem, no disco óptico ou no nervo, quiasma óptico, trato óptico ou nucleos geniculados laterais. As manifestações clínicas podem incluir diminuição da acuidade visual e sensibilidade a contraste, visão de cores prejudicada e defeito pupilar aferente. <p>Fonte: DeCS server. Disponível em: http://decs.bvs.br.<p> ]]></baseNameString></baseName>  </occurrence></topic>  <association>    <instanceOf>      <topicRef xlink:href="#broader-narrower"/>    </instanceOf>    <member>      <roleSpec>  <topicRef xlink:href="#narrower"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=68319"/>    </member>    <member>      <roleSpec>  <topicRef xlink:href="#broader"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=31887"/>    </member>  </association>  <association>    <instanceOf>      <topicRef xlink:href="#broader-narrower"/>    </instanceOf>    <member>      <roleSpec>  <topicRef xlink:href="#narrower"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=31887"/>    </member>    <member>      <roleSpec>  <topicRef xlink:href="#broader"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=69786"/>    </member>  </association></topicMap>