What Causes Balance And Vision Problem After A Brain Surgery?

hi. I had my brain surgery about 3 years ago. I had my avm removed. I suffered multiple hemorrhaging at the base of my brain. I was told I was born with this initially. I am doing amazing fantastic!! my speech was effected, I speak okay not as fluently as before( former school teacher:)) my balance is somewhat off, peripheral vision effected, laying my head back or looking up is a problem other than these challenges, I am doing incredible! could you tell me if you experienced with such a case with any other patients? thank you kindly, Pamela