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Intensity A-Constant conversion table

Optical / Immersion US

Contact US

Intensity BN

SRK/T
A Constant
118.4
118.06
Hoffer Q
pACD
5.15
4.93
Holladay 1
sf
1.39
1.17
a0
0.928
0.699
Haigis
a1
0.4
0.4
a2
0.1
0.1
Barrett
if
1.57
1.39
df
9.5
9.5

Intensity SL

A Constant
SRK/T
118.4
118.06
Hoffer Q
pACD
5.15
4.93
Holloday
sf
1.39
1.17
a0
0.928
0.699
Haigis
a1
0.4
0.4
a2
0.1
0.1
Barrett
if
1.57
1.39
df
9.5
9.5

Intensity Toric

A Constant
SRK/T
117.45
117.11
Hoffer Q
pACD
4.65
4.45
Holloday
sf
0.82
0.69
a0
0.346
0.26
Haigis
a1
0.4
0.4
a2
0.1
0.1
Barrett
if
1.07
0.89
df
9.5
9.5

1 IOL constant was evaluated using IOL master and the SRK/T formula, relations between constants
2 IOL constant was evaluated using US biometry and the SRK/T formula, relations between optical and us biometry
* It is recommended that surgeons personalize their IOL constant based on their surgical techniques and equipment, experience and post-operative results.

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