It is important to remember that these numbers simply represent a starting point, with optimization to follow.
These lens constants are not meant to be definitive.
To begin the process of optimization, please visit our Calculators & Downloads.
| IOL Model | Mfr A-constant | Haigis a0, a1 & a2 | Holladay-1 Surgeon Factor | Hoffer-Q pACD | SRK/T A-constant | Implants | Contributors |
| Alcon MA60AC | 118.4 | a0 = 0.585 a1 = 0.221 a2 = 0.151 |
1.64 | 5.39 | 118.71 | 220 | 11 |
| Alcon SN60WF | 118.7 | a0 = -0.576 a1 = 0.311 a2 = 0.197 |
1.81 | 5.61 | 119.02 | 2111 | 1, 2, 3, 4, 5, 6, 9, 10, 11, 13 |
| AMO Tecnis Z9002 |
118.7 | a0 = -1.185 a1 = 0.211 a2 = 0.244 |
1.97 | 5.78 | 119.20 | 289 | 8 |
| AMO Tecnis ZMB00 |
118.8 | a0 = -0.735 a1 = 0.293 a2 = 0.219 |
2.11 | 5.90 | 119.47 | 231 | 12 |
| AMO Tecnis 1 ZCB00 | 118.8 | a0 = -0.028 a1 = 0.313 a2 = 0.184 |
2.07 | 5.88 | 119.37 | 208 | 7 |
| B&L Akreos Adapt AO |
118.0 | a0 = -0.418 a1 = 0.259 a2 = 0.186 |
1.60 | 5.39 | 118.63 | 222 | 9 |
Physician Contributors
- Douglas Koch, MD, Houston, TX, USA
- Li Wang MD PhD, Houston, TX, USA
- Johnny Gayton, MD, Robbins-Warner, GA, USA
- Sheridan Lam MD, Chicago, IL, USA
- Warren Hill MD, Mesa, AZ, USA
- Les Grosinger MD, Bloomfield Hills, MI, USA
- Joseph Sokol MD, Shelton CT, USA
- Aaron Kuzon MD, Mount Vernon, VA, USA
- Brad McCuaig MD, Kitchener, ON, CANADA
- John Zdral MF, Fullerton, CA, USA
- Nitin Patel MD, Navsari, Gujarat, INDIA
- Joseph Bishop, Hilton Head Island, SC, USA
- Randy Ennen, MD, Ft. Smith, AR, USA
It is important to remember that these numbers simply represent a starting point, with optimization to follow.
These lens constants are not meant to be definitive.
To begin the process of optimization, please visit our Calculators & Downloads.

