In my case, my doc found me a good candidate because I was hyperopic, I have smallish pupils, I had virtually no astigmatism, my retinas were healthy, and I'm a fairly relaxed patient who wasn't expecting perfection. Seeing well again, with or w/o readers was all I wanted. My results were far better than I expected.
As for my doctor's qualifications: I've gone to him for years; he is an unusually thoughtful person who does not 'push' surgery though he does a lot of it. He actively considers the best lens for the individual.
In researching lens replacements, you can get a lot simply by googling the lens you are interested in, plus qualifiers like 'far-sightedness,' etc. Some of the sites will be commercial--that is, essentially ads by doctors who do replacements. Their observations, however, are valid, and reading a lot will help you distinguish those who are merely 'selling' from those who are reporting their results. Here is one to read to start with:
http://www.eyeworld.org/ewsupplementarticle.php?id=223
Here's a discussion among doctors about which of their patients do best with what:
http://www.eyeworld.org/article.php?sid=3560
You can find a lot of information on your own with an active search, and you will become better informed for doing so.
Healthy eye besides the cataract. Hitting target and eliminating astigmatism.
Dr. O.