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Table 2 Intraocular lens constants used for formulas

From: Prediction accuracy of intraocular lens power calculation methods after laser refractive surgery

 

Formula

 

Haigis

Shammas-PL

IOL model

a0

a1

a2

C

IOL-Master

 920H

0.154

0.166

0.166

4.612

 Adapt-AO

−1.418

0.629

0.176

4.710

 SN60WF

1.948

0.376

0.076

4.883

 ZCB00

−3.031

0.331

0.309

5.403

AL-3000 assisted with TMS-4

 920H

−1.068

0.209

0.191

4.176

 Adapt-AO

−0.319

0.563

0.106

4.114

 SN60WF

3.091

0.319

0.009

4.432

 ZCB00

0.632

0.614

0.095

4.931