Long before we knew that my husband had PD, he frequently (almost always) experienced a very difficult time (feeling 'ill/disoriented', etc., & usually had to leave before we were finished) dealing with the supermarket/drug store - anywhere there is flouresent lighting - experience. I, too, wonder at what the connection is......but then, all I can do is wonder. As always, many questions, not enough answers...........((((Hugs)))) to all of us...we sure do need them.......Roberta