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What does angiography do?
Diagnostic test to see vascular damage or leakage
Diff between fluorescein and ICG?
- fluorescein: seen with visible light- RETINAL CIRCULATION
- ICG: seen with infrared light- CHOROIDAL CIRCULATION
Diff of characteristics b/w fluorescein and ICG?
- Fluorescein: absorbs blue light, emits yellow green, can diffuse from vessels
- ICG: absorbs near infrared, emits infrared, doesnt leak from vessels
Possible hazards of fluorescein/ICG?
- dilation urine discolouration
- RARE: anaphylatic, cardiac, respiratory
Diff between inner/outter BRB?
- inner: clear pic of retinal bv
- outer: optical barrier to fluorescein and choroidal circulation
Why does the macula appear dark with ICG/FA
macula has absorbing pigments- luthein, zeaxanthin
What does FAF detect?
- levels of lipofuscin
- hyperfluoresce-> cells are compromised
What is FAF good for?
- monitoring progression of disease
- edges of lesion are hyperpigmented
ERG purpose and what to look for?
- - functionality of retina
- - latency and amplitude
reflects general physiological health of PR- outer retinal layers
- reflects PR to bipolar cell transmission
- - inner retinal layers