Please check out the other articles too or read some more of that article - they point out that their findings are not the norm and speculate as to why that cou

Please check out the other articles too or read some more of that article - they point out that their findings are not the norm and speculate as to why that could be. I suspect it's because they used too much defocus (you wouldn't be able to read anything with the amount of defocus they're using, so completely impractical for real life) - that has led to axial elongation in many other studies too.