A Constant

Hanita lenses A constant conversion table

 

Relations between optimized constants for Hanita Lenses IOLs

 

Formula

SRK/T Hoffer
Q
Holladay
1
Haigis

Constant

A
Constant
pACD Surgeon
Factor
a0 a1 a2
 Hydrophilic Aspheric

SeeLens AF1

Optical /

Immersion US

118.9 5.46 1.67 1.243 0.4 0.1
Contact US 118.56 5.24 1.46 1.018 0.4 0.1

BunnyLens AF2

Optical /

Immersion US

118.5 5.2 1.42 0.978 0.4 0.1
Contact US 118.16 4.98 1.2 0.753 0.4 0.1

 Hydrophobic Aspheric

SeeLens HP

Optical /

Immersion US

119.0 5.58 1.81 1.40 0.4 0.1
Contact US 118.5 5.25 1.49 1.05 0.4 0.1

BunnyLens HP

Optical /

Immersion US

118.9 5.56 1.77 1.4 0.4 0.1
Contact US 118.4 5.23 1.44 1.03 0.4 0.1

 Hydrophilic Multifocal

SeeLens MF2

Optical /

Immersion US

118.6 5.26 1.48 1.044 0.4 0.1
Contact US 118.26 5.05 1.27 0.819 0.4 0.1

BunnyLens MF2

Optical /

Immersion US

118.5 5.2 1.42 0.978 0.4 0.1
Contact US 118.16 4.98 1.2 0.753 0.4 0.1

 Hydrophilic Spheric

B-Lens2

Optical /

Immersion US

118.54 5.23 1.44 1.004 0.4 0.1
Contact US 118.2 5.01 1.23 0.779 0.4 0.1

SeeLens2

Optical /

Immersion US

118.6 5.26 1.48 1.044 0.4 0.1
Contact US 118.26 5.05 1.27 0.819 0.4 0.1

BunnyLens2

Optical
/

Immersion US

118.54 5.23 1.44 1.004 0.4 0.1
Contact US 118.2 5.01 1.23 0.779 0.4 0.1

 Hydrophilic Toric

Vistor/Perfector

Optical /

Immersion US

117.7 4.86 1.02 0.448 0.4 0.1
Contact US 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