AAAA Flashcards
1
Q
optimise fit for SCL
A
0.3 BC =0.5 TD
same direction
2
Q
optimise fit for RGP
A
0.05 BC = 0.4 TD
OPPOSITE DIRECTION!
BC change by 0.05 = BVP change by 0.25D to compensate for TL
3
Q
formula for RGP
A
OR + TL + trial CL rx = ocular RX
4
Q
formula for tear lens
A
0.05 diff between BC and K = 0.25D
5
Q
what are the threshold for IS, SAI and SRI in corneal topo
A
IS: 1.5
SAI: 1.0
SRI: 0.8
6
Q
what is the average for E value and norm values
A
avg: 0.43
norm: 0.4-0.57
7
Q
formula for CL rx
A
F / 1-dF
