Has anyone had experience with the prism glasses that are supposed to expand your peripheral vision? I had brain surgery 3 months ago and as a result lost my left peripheral vision in both eyes. I've been researching the glasses and would like a first hand opinion as to whether they really do expand your peripheral vision. I would also really appreciate some advice of where I can find a detailed/upclose picture of them online or from someone. I have appointments at the end of August w/a low vision specialist and a neuro opthomologist, but would really like to get more first hand experience feedback before then. Thanks Heather