Intraocular Lens Optics Flashcards
1
Q
ELP
A
Distance from lens to cornea
2
Q
Where is the image formed in an eye that is aphakic?
A
Way behind the retina, because the eye is lacking the plus crystalline lens to bring the image forward
3
Q
In an emmetropic eye, the optical power of the IOL to be inserted is
A
Positive, about 20D
4
Q
SRK formula
A
P(IOL)=A-0.9K-2.5L
5
Q
What do we absolutely need to measure before we do IOL selection
A
Axial length
Keratometric
6
Q
What do we need in order to calculate the IOL power?
A
- corneal power
- ELP
- Axial length
- constants
7
Q
What does 1mm error in axial length do to the power of the IOL selected?
A
Adds about 3D to it
