This is really fantastic science. For all of you who know that it is the colours in the light that make it difficult for people with Irlen it helps to explain how light can affect our brain. Because light is energy and travels to us in waves of energy but also contains actual particles of energy as well and the fact that our whole body uses energy helps to understand HOW the light can disrupt the processes that are going on in our brain (and elsewhere in our bodies). It’s like one form of energy interfering with another. Our brain controls our entire body so if our brain is not calm, then our whole body is not calm. When people put on their selected Irlen lenses (which are really Spectral Filters) they often remark, that they have never felt that calm before. And this is instant!