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Yesterday, In the course of making a point which is unclear to me a fello= w named Bill cites the following example: "I'm not entering into the great snake oil debate, but I have a (short) story to tell.Years ago, there was a post by a gentleman who claimed he h= ad the answer for all those PWP who suffered from severe extra movements particularily when under stress. He claimed tinting your glasses a light shade of blue would cause the eyes to be able to focus and help stop the jerking of your head, followed by your limbs. For only $1 he would send you lenses that would clip over your glasses... this is his general idea I may not have the wording exact. But the thing was he was laughed off the list. A short time later, I was getting my eyes checked for my reading glasses and I asked the optometrist, as I squirmed around, if he had ever heard of such a thing but it was possible. As I had to have my lenses changed anyway for a small extra cost I had them tinted light blue. Not only did I look like "Link" from the "Mod Squad" it actually worked, (works). Now, whenever I know I'll be in a stressfull situation I drag out my trusty glasses.." As I mentioned his point eludes me however since the blue filter phenomen= on is my discovery I would like to correct a number of inaccuracies in the = example he describes above. Blue filters will suppress dyskinesia in a= significant percentage of PWP but not all. It impacts about 1/3 somewhat= more in the younger population. Actually tinting the glasses a shade of= blue will have little impact unless the glasses wrap around and cover th= e extreme periphery of the eye. I won't speculate on the mechanism of acti= on here, but it most definitely has nothing to do with enabling the eye to focus better. And finally, at no time did I request any payment for anything to do with the blue filter phenomenon. In fact I have sent many= people blue filters at no charge. To my knowledge I have not been "laugh= ed off the list". regards, Tom