Maybe, because of my experience with albino deer, I can answer your questions about them. I'm from central Minnesota and I've had twin albino whitetails coming to my backyard feeder since they were fawns back in 2006.
Their mother was brown so I would say yes, brown does can have albino fawns. At least it's the case with my experience.
As far as eyesight, the twins in my yard can see very well. But my farmer buddy has an albino buck on his land that's 5 or 6 years old and it's eyesight is very poor.
If you would like to see more of the albino twins, you can go to this link;
Local TV from Minneapolis did a segment on them from my home. The twins are only 35' from my patio door so the film crew got some great footage. There is some of my own personal video on the show and in that video you can see the twins mother. Look closely to the left of my apple tree. She blends in well with the brown grass but she is visible.