A Constant

Hanita lenses A constant conversion table

 

Relations between optimized constants for Hanita Lenses IOLs

 

Formula

SRK/T SRK II Hoffer Q Holladay 1 Haigis

Constant

A Constant A Constant pACD Surgeon Factor a0 a1 a2
 

Hydrophilic Aspheric


SeeLens AF1

Optical /
Immersion US
118.9 119.28 5.46 1.67 1.243 0.4 0.1
Contact US 118.56 118.85 5.24 1.46 1.018 0.4 0.1

BunnyLens AF1

Optical /
Immersion US
118.5 118.78 5.2 1.42 0.978 0.4 0.1
Contact US 118.16 118.35 4.98 1.2 0.753 0.4 0.1

Hydrophobic Aspheric

SeeLens HP1

Optical /
Immersion US
119.5 120.03 5.84 2.06 1.64 0.4 0.1
Contact US 119.16 119.6 5.62 1.84 1.415 0.4 0.1

BunnyLens HP1

IOL MASTER 118.5 118.78 5.2 1.42 0.978 0.4 0.1
Contact US 118.16 118.35 4.98 1.2 0.753 0.4 0.1

Hydrophilic Multifocal

SeeLens MF1

Optical /
Immersion US
118.6 118.9 5.26 1.48 1.044 0.4 0.1
Contact US 118.26 118.48 5.05 1.27 0.819 0.4 0.1

BunnyLens MF1

Optical /
Immersion US
118.5 118.78 5.2 1.42 0.978 0.4 0.1
Contact US 118.16 118.35 4.98 1.2 0.753 0.4 0.1

Hydrophilic Spheric

B-Lens2

Optical /
Immersion US
118.54 118.83 5.23 1.44 1.004 0.4 0.1
Contact US 118.2 118.4 5.01 1.23 0.779 0.4 0.1

SeeLens2

Optical /
Immersion US
118.6 118.9 5.26 1.48 1.044 0.4 0.1
Contact US 118.26 118.48 5.05 1.27 0.819 0.4 0.1

BunnyLens2

Optical /
Immersion US
118.54 118.83 5.23 1.44 1.004 0.4 0.1
Contact US 118.2 118.4 5.01 1.23 0.779 0.4 0.1

Hydrophilic Toric

Vistor

Optical /
Immersion US

117.7 117.8 4.86 1.02 0.448 0.4 0.1
Contact US 117.3 117.3 4.61 0.77 0.184 0.4 0.1

 

 

1 IOL constant was evaluated using IOL master and the SRK/T formula, relations between constants – http://www.augenklinik.uni-wuerzburg.de/scripts2/ciolc.php
2 IOL constant was evaluated using US biometry and the SRK/T formula, relations between optical and us biometry – http://www.augenklinik.uni-wuerzburg.de/ulib/relat.htm
* It is recommended that surgeons personalize their IOL constant based on their surgical techniques and equipment, experience and post-operative results.

 

Clinical Literature

A Constant - Conversion Table