I had major problems withmy perifrial (sp?) it wasn't that I didnt see it was that only what was directly in front of me was all my brain was processing.
I did vision therapy and saw a neuro opthomologist. It really helped to improve my vision/processing and gave me tools to work around my problems - 3 diff pairs of glasses depending on how tired my brain is, learning to recongnise when I wasn't processing as well.
It's been a journey but it helps to celebrate every goal finished. I celebrate with cupcakes