Parkinson’s patients sometimes fail to take the next step when they’re walking. That’s because their brains do not immediately respond to this intention. To make it easier they need a reference item on which to focus, but such object is not always in front of them.
That’s why a university in the Netherlands has developed laser shoes. They project in front of the person who’s wearing the shoes a red line at a distance of 45 cm. When the person is standing, the shoes activate by themselves, and when they’re walking they stop and act just like a regular pair of shoes.