Lecture 4 - ERG and EOGs Flashcards
(11 cards)
1
Q
In the ERG the c-wave represents?
A
RPE: pigment epithelium
2
Q
In the ERG the a-wave represents what?
A
photoreceptors: rods and cones
3
Q
In the ERG the b-wave represents what?
A
ON bi-polar cells and Muller cells
4
Q
In the ERG the d-wave represents what?
A
OFF bi-polar cells
5
Q
In the ERG what does the OPs (oscillatory potentials between A and B) represent?
A
amacrine cells
6
Q
What can be diagnosed by EOG?
A
Best’s Disease
7
Q
ERG finding:
- Scotopic ERG almost completely gone
- Photopic ERG relatively unchanged
A
Complete CSNB; complete congenital stationary night blindness. Happens in children.
8
Q
ERG Finding:
- normal scotopic
- no flicker or photopic ERG
A
Rod Monochromatism
9
Q
ERG Finding:
- normal scotopic
- cone responses smaller and slower
A
Cone Dystrophy
10
Q
ERG finding:
- loss peripheral retina
- rods of ERG reduced; scotopic reduced
- A and B from photopic also reduced
- Flicker and photopic wave form will be reduced
A
Retinitis Pigmentosa
11
Q
Which were the best tools to diagnose Stargardt’s Disease? Choose 2. a) Visual field b) EOG c) ERG d) mfERG
A
A and D
Visual field and mfERG
