Patterns

I've always had the ability to see patterns when my eyes are closed. If I shut my eyes, I get a little light show. The patterns vary. Sometimes I see swirling colors, sometimes it's geometric shapes. It is never very clearly focused, but it is always somewhat entertaining. I've been told that this is rather unusual, as most people don't "see" things when their eyes are closed. This morning I had a new phenomenon; I saw textures. It was as if I were looking at a lizard skin up close, seeing tiny scales, with color. Today it was yellow. I've never understood what causes these images, but they are cool to watch when I can't sleep.