They published another formula and this was also for humanitarian missions.
And this was also out of the United States Navy.
This particular author right here was on both papers.
And this one came out a few years before, this was in 2009.
They showed the average mean IOL power for several different populations.
And if you look at it, it's about a 21.5 diopter lens.
Now, for the Taiwan population, it was 20.0
because that population is a more myopic population.
So a more myopic population is going to require a lower lens power.
These A-Constants were about a 118.5.
So if you have a lens that has a 119, you'll want to go up about a half diopter.
So you would use about a 22.0, mean IOL power for your population.
And then my friend in Zimbabwe when he operates on men,
he uses a 21.0 because he didn't have any equipment to measure.
And when he operated on women, he used one diopter higher 22.0.
And the reason was he knew that the women did more near tasks.
So he gave them a little bit higher willpower.