Tomey OA-2000 - SRK;T Formula

4-5 ■
3. Personal SF

22/4{
2
CAQCQAQBQBQSF  ｝･
Where:
AQ = (nc-1) - 0.001AREF {V(nc - 1) - r}
BQ = 0.001AREF {L2･V(nc - 1) - r(L2 - V･na)}
- {L2(nc - 1) + na･r}
CQ1 = 0.001AREF[V{na･r - L2(nc - 1)} + L2･r]
CQ2 = 1000na{na･r – L2(nc - 1) - CQ1}/P
CQ3 = L2･na･r-0.001AREF･L2･V･r･na
CQ = CQ3-CQ2
AREF : Refractive power of eye after surgery (D)
4. Corresponding SF
SF = 0.5663A - 65.60
or
SF = 0.9704 ACDcon – 3.595
Where:
A : A-Constant
4.1.4 SRK/T formula
1. Implanted IOL power (D) for emmentropization

YCL
Xna
P
emme
11
1000



2. Implanted IOL power (D) for ametropia




  
rCYVREFYCL
rLXVREFXna
P
amet





1001.011
1001.01000
3. Predicted refractive power after surgery (D)



rCYVCLPrLXVna
CLYPXna
REF
iol






111001.01
111000
Where:
X = na・ｒ – L1 (nc – 1)
Y = na・ｒ – C1 (nc – 1)
L1 : Visual axial length (mm)
= L + (0.65696-0.02029L)
L : Axial length (mm)
REF : Target Ref. after surgery (D)