The personalized surgeon A-constant is usually a different A-constant than the standard A-constant supplied the IOL company. It is determined by putting the outcomes results from using that IOL in to a program. I use Holladay Professional. I believe it can be done with the IOL Master. It results in a better outcome since it personalized for the surgeon's technique for cataract surgery.
Dr. O.
Oops, I wasn't finished.
Different IOL Masters gave diff. results on the same AlconSN60WF IOL.
What is the personalized A constant, and would it show up on the IOL Master results of which I have a copy of. ?
Thanks Dr. O.
I did ask my surgeon...got 3 different opinions from 3 different surgeons, so I feel the need to "plug in" my own opinion based on additional research.
I too was leaning in the 24.0D direction, as I always like a "happy medium". I also read that without the vitreous support that the Cataract surgery may cause the lens to sit further back than predicted, so one should over-compensate in the Myopic direction with Target.
#1) Is that correct...should we perhaps go further into the myopic area?
The margin of error of .50 is what I read was most normal to expect,
#2) is that what you have found?
Different IOL Masters gave diff. results on the same Alcon Sn
You should ask your surgeon. Is he using a personalized A constant?
Just from the numbers I would use 24.0D. You will end up between +.04 to -0.96 from the margin of error your have given me.
Dr. O.