The discussion re balance has interested me re the effect of vision on the balance. Ted had a very serious sinus operation years ago wherein the infection had eaten into the bone. A great deal of bone was surgically removed and his eye was rotated and is supported by muscle. Glasses must be rotated and prisms used for that eye. Anybody have any thoughts on this. His biggest problem with Parkinson's is balance. I have also been noticing some problems with depth perception. Thanks Virginia Christiansen [log in to unmask] White Plains, NY