ØYET - Anatomi

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Marlene Lauritzen

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Science

https://www.youtube.com/watch?v=xO6gIiuY69g

Bindehinna
Hornhinna
Regnbuehinna
Kammervæsken
Pupillen
Linsen
Fibrer som
holder linsen
Muskel
Glasslegemet
Den gule flekken
Den blinde
flekken
Synsnerven
Netthinna
Årehinna
Senehinna
Blodårer

Blodårer
- Sirkulere
- Irritasjon/betennelse
- Verksted

Muskel
- Regulerer linsen
- Strammer
- Slakke

Glasslegemet
- Gjennomsiktig
- Geléaktig væske
- Fyller rommet mellom linsen og netthinnen

Netthinna
- Bakerst i øyet
- Sanseceller  fanger opp lysstrålene
- To typer:
 Staver – gråtoner, svart og hvitt
 Tapper – farger

Synsnerven
- Synsinntrykket  synsnerven  hjernen
- Bildet som blir dannet på netthinna,
står opp ned!!
- Oppfatter bildet riktig vei

Den gule flekken
- Plassert rett bakenfor pupillen
- Tappene konsentrert rundt et punkt
- Lysstrålene som treffer i dette området, kommer rett forfra
- Ser skarpest og best rett fram

Den blinde flekken
- Punkt på netthinna
- Synsnerven går ut bak øyet
- Når vi bruker begge øynene vil den blinde
flekken ikke skape problemer, men om vi
holder for de venstre øyet og stirrer på
tryllekunstneren mens vi fører øyet
nærmere arket vil vi før eller senere se at
kaninen til høyre for tryllekunstneren
forsvinner

Linsen
- Fokuserer lysstrålene
- Fungerer som en kameralinse
- Gjennomsiktig legeme

Fibrer som holder linsen
- Mange tynne tråder
- Festet i ringmuskel

Pupillen
- Regulerer lyset
- Sterkt lys  pupillen er liten
- Mørkt  pupillen er stor
- Størrelsen reguleres automatisk
 Refleks

Kammervæske
- Fyller den fremste delen i øyet
- Hjelper hornhinnen og linsen
- Holder øyeeplet «uspent»

Regnbuehinna
- Fargede delen av øyet
- Pigmenter avgjøre øyefarge
- Strammer og utvider pupillen

Hornhinna
- Lyset brytes
- Dekker regnbuehinnen, pupillen og øyets
fremste kammer

Bindehinna
- Dekker det hvite i øyet
- Slimhinne
- Nett med ørsmå blodårer, som først blir synlig ved betennelse eller
skade.

Senehinna
- Beskytter indre del
- Form
- Festet til musklene

Årehinna
- Sitter mellom senehinna og netthinna
- «Mater» netthinna

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ØYET - Anatomi

1. https://www.youtube.com/watch?v=xO6gIiuY69g

2. Bindehinna Hornhinna Regnbuehinna Kammervæsken Pupillen Linsen Fibrer som holder linsen Muskel Glasslegemet Den gule flekken Den blinde flekken Synsnerven Netthinna Årehinna Senehinna Blodårer

3. Blodårer - Sirkulere - Irritasjon/betennelse - Verksted

4. Muskel - Regulerer linsen - Strammer - Slakke

5. Glasslegemet - Gjennomsiktig - Geléaktig væske - Fyller rommet mellom linsen og netthinnen

6. Netthinna - Bakerst i øyet - Sanseceller  fanger opp lysstrålene - To typer:  Staver – gråtoner, svart og hvitt  Tapper – farger

7. Synsnerven - Synsinntrykket  synsnerven  hjernen - Bildet som blir dannet på netthinna, står opp ned!! - Oppfatter bildet riktig vei

8. Den gule flekken - Plassert rett bakenfor pupillen - Tappene konsentrert rundt et punkt - Lysstrålene som treffer i dette området, kommer rett forfra - Ser skarpest og best rett fram

9. Den blinde flekken - Punkt på netthinna - Synsnerven går ut bak øyet - Når vi bruker begge øynene vil den blinde flekken ikke skape problemer, men om vi holder for de venstre øyet og stirrer på tryllekunstneren mens vi fører øyet nærmere arket vil vi før eller senere se at kaninen til høyre for tryllekunstneren forsvinner

10. Linsen - Fokuserer lysstrålene - Fungerer som en kameralinse - Gjennomsiktig legeme

11. Fibrer som holder linsen - Mange tynne tråder - Festet i ringmuskel

12. Pupillen - Regulerer lyset - Sterkt lys  pupillen er liten - Mørkt  pupillen er stor - Størrelsen reguleres automatisk  Refleks

13. Kammervæske - Fyller den fremste delen i øyet - Hjelper hornhinnen og linsen - Holder øyeeplet «uspent»

14. Regnbuehinna - Fargede delen av øyet - Pigmenter avgjøre øyefarge - Strammer og utvider pupillen

15. Hornhinna - Lyset brytes - Dekker regnbuehinnen, pupillen og øyets fremste kammer

16. Bindehinna - Dekker det hvite i øyet - Slimhinne - Nett med ørsmå blodårer, som først blir synlig ved betennelse eller skade.

17. Senehinna - Beskytter indre del - Form - Festet til musklene

18. Årehinna - Sitter mellom senehinna og netthinna - «Mater» netthinna

ØYET - Anatomi

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