At my old yoga class from twenty years ago, we used to meditate about a golden healing light that you could conjour up to relax and help heal aches and pains. Recently I remembered this, so when I am trying to sleep and struggling to stop circular and intrusive thoughts, I close my eyes and try and notice the flow of blood in the back of my eye. Sometimes I catch sight of a sparkly gold light flowing in waves across my vision. I don’t exactly know what it is, I think it’s linked to my pulse, but it’s definitely a visual thing, not imagined. I then think the words ‘golden healing light’ over and over as I watch the waves of light wafting across my vision. I don’t know if this would be of any help to anyone, but it’s an interesting phenomenon.