Hill-RBF Calculator Lens Constants

Below are lens constants for popular IOLs to be used with the Hill-RBF calculator. If optimized lens constants are not available, these should be considered as only a starting point. In general, the typical SRK/T A-constant used for an IOL would be what you would use for the Hill-RBF calculator. Ideally, outcomes should be carefully monitored and lens constants adjusted as needed (up or down) by no more than 0.1 every 10 cases. As new IOLs are introduced, this listing will be updated. Suggestions are welcome and can be sent to:


Alcon IOL Model A-constant
Alcon MTA2UO - MTA6UO 115.54
Alcon AcrySof MA30AC 118.74
Alcon AcrySof MA60AC & MN60AC 118.74
Alcon AcrySof SA60AT & SN60AT 118.74
Alcon AcrySof SA60WF & SN60WF 119.02
Alcon AcrySof AU0T00 Pre-loaded UltraSert 119.02
Alcon ReSTOR SN6AD1 +3.00 add 119.04
Alcon ReSTOR SN6AD3 +4.00 add 119.04
Alcon AcrySof MA50BM 119.10
Alcon AcrySof MA60MA / MN60MA Extended Range 119.10
Alcon PanOptix TFNT00 Trifocal 119.10
Alcon ReSTOR 3-piece MN6AD1 +3.00 add 119.18
Alcon IQ Toric SN6ATx (T2 - T9) 119.20
Alcon ReSTOR SV25T0 +2.50 add 119.50
AMO - Johnson & Johnson IOL Model A-constant
AMO - Johnson & Johnson AR40 series (M, E, e) 118.70
AMO - Johnson & Johnson Tecnis Z9002 118.72
AMO - Johnson & Johnson Tecnis ZA9003 119.10
AMO - Johnson & Johnson Tecnis ZCB00 & Tecnis PCB00 Pre-loaded 119.34
AMO - Johnson & Johnson Tecnis Toric (ZCT150 - ZCT600) 119.34
AMO - Johnson & Johnson Symfony ZXR00 119.34
AMO - Johnson & Johnson Symfony Toric (ZXT100 - ZXT375) 119.34
AMO - Johnson & Johnson Tecnis Multifocal ZKB00 +2.75 add 119.42
AMO - Johnson & Johnson Tecnis Multifocal ZLB00 +3.25 add 119.42
AMO - Johnson & Johnson Tecnis 3-piece Multifocal ZMA00 +4.00 add 119.42
AMO - Johnson & Johnson Tecnis Multifocal ZMB00 +4.00 add 119.42
Bausch & Lomb IOL Model A-constant
Bausch & Lomb L122UV & S122UV 116.14
Bausch & Lomb L161AO 118.50
Bausch & Lomb Trulign Toric 119.00
Bausch & Lomb Crystalens AT50 119.00
Bausch & Lomb Crystalens AO & Crystalens HD 119.10
Bausch & Lomb enVista MX60 & enVista MX60T toric 119.10
Bausch & Lomb Crystalens AT52 119.28
Biotech IOL Model A-constant
Biotech Eyecryl Toric 118.99
Hoya IOL Model A-constant
Hoya iSert 250 / iSert 251 118.58
Lenstec IOL Model A-constant
Lenstec Softec HDO 118.40
Lenstec SBL-3 118.35
Medicontur IOL Model A-constant
Medicontur Bi-Flex 677AB/677ABY 118.10
Medicontur Q-Flex 640AB/640ABY 118.10
Medicontur Bi-Flex 677P/PY 118.90
Medicontur Q-Flex PIL-MA 640P/PY/PMY 118.90
Medicontur Bi-Flex PIL-MA 677PT/PTY/PMY/MTY/PMTY 118.90
Medicontur Bi-Flex T toric 677TA/TB/TAY/TBY 118.90
Medicontur Bi-Flex M 640MY/677MY 118.90
Medicontur Bi-Flex HB 877FAB/877FABY 118.90
Medicontur Bi-Flex POB-MA 877PA/877PAY 118.90
Oculentis IOL Model A-constant
Oculentis LU313 MF30T 118.20
Oculentis L402 118.20
Oculentis L302-1 118.30
Oculentis L312 118.50
Oculentis LS313 118.50
Oculentis Lentis Mplus X 118.50
Oculentis LS502-1 118.70
PhysIOL IOL Model A-constant
PhysIOL Micro F 118.80
PhysIOL Micro+ A 123, Micro+ AY 123, & SlimFlex 118.90
PhysIOL Pod F, Pod FT, & Ankoris 118.95
PhysIOL MicroPure 123 & PodEye 119.40
Rayner IOL Model A-constant
Rayner Centerflex 570H 118.40
Rayner M-flex T 588 & 638F toric 118.70
Rayner C-flex 570C & 970C 118.75
Rayner Superflex 620H & 920H 118.75
Rayner M-flex 630F & 580F 118.80
Rayner 755U 118.80
Rayner T-flex 573T & 673T toric 118.95
Staar IOL Model A-constant
Staar CQ-2015A 118.56
Staar AA4203-TF Toric & AA4203-TL Toric 118.64
Staar AQ-2010V & AQ-5010V 119.12
VSY Biotechnology IOL Model A-constant
VSY Biotechnology MFB-625, TRINOVA, TRINOVA Toric 117.90
VSY Biotechnology MF-613, BB-MF-613 118.10
VSY Biotechnology MFM-611, A-625, AB-625, BB-MFM-611, BB-T-MFM-611 118.30
VSY Biotechnology UD-613, UDB-625, HAF, BB-UD-613 118.40
VSY Biotechnology BB-T-UDM-611 118.60
VSY Biotechnology UDM-611, BB-UDM-611 118.70
Zeiss IOL Model A-constant
Zeiss CT ASPHINA 509M & 509MP pre-loaded 117.90
Zeiss AT LISA 809M 118.00
Zeiss CT Asphina 409M 118.30
Zeiss AT LISA toric 909M 118.40
Zeiss CT ASPHINA 404 & AT TORBI 709MP 118.50
Zeiss AT LISA tri 839MP 118.80
Zeiss AT LISA tri 939MP Toric 118.80
Zeiss CT LUCIA 601P/PY 119.20
Zeiss CT LUCIA 602 (previously Aaron Scientific EC-3 PAL) 118.40