I heard that lens size is the most important factor in lens implantation surgery. Is that true?

I looked into lens implantation surgery and heard a lot of talk about how the lens size needs to fit well.

I'm drawn to it because it doesn't involve reshaping the lens like LASIK, but I'm worried since it involves putting it inside the eye.

I'm wondering if they check things like anterior chamber depth and intraocular pressure in detail during the examination.

If the lens doesn't fit, is it possible to have a re-operation or replacement?

For those who have had lens implantation surgery, I'm curious if the explanation of the examination results was sufficient.