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Summary

AFP samenvatting oog

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dit is een samenvatting van de anatomie, fysiologie en pathologie over het oog

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  • July 11, 2023
  • 7
  • 2022/2023
  • Summary
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Oog




Zintuigen
- Zorgen voor waarneming van de omgeving
- Zintuigcellen vangen prikkel (stimulus) van omgeving op
- Receptor in zintuigcel vangt prikkels op
- Prikkel wordt elektrisch signaal (receptorpotentiaal)
- Elektrisch signaal via zenuwcellen (neuronen) naar hersenen




Functie van het oog

Zintuig: vangt lichtprikkels op en stuurt deze via oogzenuw (nervus opticus) naar hersenen.
- Oog is kwetsbaar en wordt beschermd door de
Oogkassen (orbita) oogleden en wimpers.




Drie lagen van het oog
1. Harde oogrok (sclera)
Zorgt voor:
- Bescherming en stevigheid
- Zitten de oogspieren aan vast
- Omgeven door oogbindvlies (conjunctiva)
- Doorzichtig aan de voorkant  hoornvlies (cornea)

, 2. Druifvlies (uvea)
Bestaat uit:
- Vaatvlies
- Regenboogvlies (iris)
- Pupil
- Straallichaam




3. Netvlies (retina)
- Gele vlek (macula)
- Blinde vlek (papil)




Glasachtig lichaam (corpus vitreum)
- Transparante/geleiachtige substantie
- Geeft oogvulling en houdt retina op zijn plek
- 99% water en 1% vaste stof
- Helder
- Geen bloedvaten wel dunne vezel voor elasticiteit en stevigheid

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