Lecture 4 - ERG and EOGs Flashcards Preview

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Flashcards in Lecture 4 - ERG and EOGs Deck (11)
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1

In the ERG the c-wave represents?

RPE: pigment epithelium

2

In the ERG the a-wave represents what?

photoreceptors: rods and cones

3

In the ERG the b-wave represents what?

ON bi-polar cells and Muller cells

4

In the ERG the d-wave represents what?

OFF bi-polar cells

5

In the ERG what does the OPs (oscillatory potentials between A and B) represent?

amacrine cells

6

What can be diagnosed by EOG?

Best's Disease

7

ERG finding:
- Scotopic ERG almost completely gone
- Photopic ERG relatively unchanged

Complete CSNB; complete congenital stationary night blindness. Happens in children.

8

ERG Finding:
- normal scotopic
- no flicker or photopic ERG

Rod Monochromatism

9

ERG Finding:
- normal scotopic
- cone responses smaller and slower

Cone Dystrophy

10

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

Retinitis Pigmentosa

11

Which were the best tools to diagnose Stargardt’s Disease? Choose 2. a) Visual field b) EOG c) ERG d) mfERG

A and D
Visual field and mfERG