Unit 6 - Retinal lasers Flashcards
1
Q
What does LASER stand for?
Li
A
Light amplification by stimulated emission of radiation
2
Q
When was laser first introduced and in what form?
A
1946, Xenon - large burns with large visual field defects
3
Q
When were lasers first used in humans?
A
1966
4
Q
What are the pros of pattern lasers?
A
- Speed
- Painless
- Precise
- Less collateral damage
- User friendly
- Versatile
5
Q
What are the cons of pattern lasers?
A
- Too fast?
- Preset spot size
- short pulse
- Less collateral damage?
- Can’t be used in theatre
6
Q
What are the risks associated with PRP?
A
Loss of visual field (88%-92% still pass driving standard)
Reduced v/a in 3%
7
Q
What is PDT used for?
A
CSR
Cancers
IPCV
8
Q
How does PDT work?
A
Vertoporfin concentrates in CNV binding to LDL in neovascular tissue. Laser causes reactive oxygen products which cause endothelial cell damage and causing thrombus formation.
9
Q
How is PDT for CSCR different?
A
Half fluence or half dose
