anatomia do bulbo ocular
TRANSCRIPT
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ANATOMIA DO BULBO OCULAR
TÚNICAS E MEIOS DIÓPTRICOS
ESCOLA CEARENSE DE OFTALMOLOGIA
DAVYSON SAMPAIO BRAGAFortaleza; 11 de março de 2015
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BULBO OCULAREsfenóide irregular (24mm) – 1/3 órbitaInício do processo visualTamanho X Ametropias
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TÚNICAS OU CAMADAS
TÚNICA MÉDIA OU VASCULAR
TÚNICA EXTERNA OU
FIBROSA
TÚNICA INTERNA
CÓRNEA
ESCLERA
ÍRIS
CORPO CILIAR
CORÓIDE
RETINA
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TÚNICA EXTERNA CÓRNEA:
1/6 da túnicaAvascularTransparenteInervaçãoPrincipal funçãoNutrição: difusão
OBS: MOTIVOS DA CÓRNEA SER TRANSPARENTE
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TÚNICA EXTERNA CÓRNEA:
5 camadas
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TÚNICA EXTERNA ESCLERA: 5/6
Estrutura mais resistente do olhoOpaca (dispersão interna)
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TÚNICA MÉDIA
ÚVEAÍRIS
CORPO CILIAR
CORÓIDE
UVEÍTES
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TÚNICA MÉDIA ÍRIS:
Cor ao olhoDelimita orifício centralPossui músculos: radiais e circulares (SNA)
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TÚNICA MÉDIA CORPO CILIAR:
Local onde a íris se insere 2 funções primordiais
.
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TÚNICA MÉDIA CORÓIDE:
Ant: ora serrataPost: nervo ópticoRicamente vascularizadaMetabolismo
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TÚNICA INTERNA RETINA:
Tecido nervosoFunção:
IMAGEM IMPULSO NERVOSO
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TÚNICA INTERNA RETINA:
Formada por 10 camadas
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CÂMARA ANTERIOR E VÍTREO
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MEIOS DIÓPTRICOS CÓRNEA
CRISTALINO
HUMOR AQUOSO
HUMOR VÍTREO
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MEIOS DIÓPTRICOS CÓRNEA:
2/3 do poder refrativo40 dioptrias; IR=1,33Lente convexa – focaliza o feixe luminoso
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MEIOS DIÓPTRICOS CRISTALINO:
Lente biconvexa; IR=1,4020 dioptrias (repouso)9mm diâmetro/4mm espessuraACOMODAÇÃO
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OBRIGADO!