There aren't any doctors that limit their practice to albinism.
Our son is about 2 1/2 years old and we have been to many doctors (primarily eye doctors) searching for answers but I think that the best information we have gotten is from others in the albinism community. Nothing could compare to the wealth of information that we learned at our first NOAH event just by talking to others in the community. What has worked for them as well as what hasn't.
I would suggest that you do indeed ask your PO questions that pertain to her strabismus but at the same time you can feel free to ask questions here. Additionally, use the search feature on this website to search for posts that deal with topics of your questions (ie strabismus.)
If you are not confident in your pediatrician or PO (we weren't) then you can move on. Eventually you will find a doctor (or team) that you are comfortable with.
Of course there will be questions that you may not necessarily want to share on a public forum. That's where creating friendships is so important because you can then e-mail, im, text, or even meet in person.
My wife (Andrew's Mommy) spent the better part of a year on this website, both asking and answering questions virtually nonstop. We have developed some incredible friendships with a number of NOAH families. Jill has also met a number of people through Facebook that are involved with the albinism community.
We have heard some unbelievable stories of things that doctors have said regarding albinism. Personally, I believe that the best second opinions come from the members of NOAH because then you are dealing with multiple opinions and not just first or seconds. Eventually you will find your path.
Good luck and know that things will work out in the end. You are not the first to go through this experience and you won't be the last. NOAH's greatest resource is its members.