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Samenvatting Klopto: Het Perifere Netvlies

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Uitgebreide samenvatting Klinische Optometrie over: het perifere netvlies met nuttige afbeeldingen. Jaar 2 Blok B optometrie. De samenvatting bevat de uitwerking van het hoorcollege over het perifere netvlies.

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Samenvatting Klinische optometrie
Perifeer netvlies




Dimensies van het oog




Het belang van perifeer netvlies onderzoek?
 Nodig voor compleet netvlies onderzoek
 Dunste punt retina
 Grootste risico (rhegmatogenous) ablatio
 Oorzaak symptomen opsporen (fotopsie, flitsen, floaters, etc.)
 Monitoren risico leasies
 Lattice, retinal break, traction, etc.
 Intelligent & competent verwijzen



Oriëntatie van het perifere netvlies
Oriënteren op klokuren!

Afstand van equator tot limbus = 14 mm
Afstand van posterior pol tot ora serrata = 3,5 diameters van een 20D lens




1

, Regio binnen de retina Gezichtsveld Anatomische locatie
Posterior pole 50o Retina net voorbij de disc en arcades
Mid perifeer 60o-100o (widefield) Retina tot achterste rand van vortex vene
ampulla
Ver perifeer 110o-2200 (ultra widefield) Voorste rand van vortex vene ampulla en
achter pars plana




Landmarks van het perifere netvlies




Vortex ampullae
 Ook wel vortexaders genoemd
 Ze zijn rood-oranje
o Lijkt op een octopus
Vortex ampullae
 Het is een landmark van de equator
 Meer zichtbaar in blonde fundusen
 Verzamelt bloed van de choroïdale ruimte
 Vaak hyperpigmentatie dichtbij, meestal langs de
vezels
 Er komen gewoonlijk 4 per oog voor (1 per quadrant),
maar er kunnen er tot wel 15 voorkomen.




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