Hi Moondaughter, Soccertese and Jomar,
It's been on the market for just the last few years and is used to help PWP who get freezing of gait mainly.
Other movement disorders have also been helped by it but it was originally marketed for PWP.
It comes attached to a walking frame or walking stick and can also be attached to your waistband and the laser light creates a line on the floor.
I find stepping on the line it creates to be very helpful in stopping F.O.G. otherwise known as 'ending up on the floor!' when my body wants to move but my feet don't.
My neuro recommended it.
I'm still raving about it a few months after getting one which came attached to a U Step walking frame.
I have a spinal cord injury too so I tend to drag my feet which complicates things a bit.
I'm sure it won't help all parkies but I find that such a simple thing has made a difference in my Q.O.L.
When outside in sunny weather I can't see the line so tend to use it in the evening, shade or indoors.