I have been seeing pictures/colors behind my eyes for years. I see these when my eyes are closed in the dark or when my eyes are open in the dark. The colors are intense and in patterns that move and change. Recently I had visions that were in shades of gray. A screen of computer text with portions missing that dissolved from the bottom. Last night it was shapes including scales like snake scales different from the Dragon scales I have seen in the colored versions. All these move and change. I see other Changing scenes with people and faces that also morph into each other. I am not asleep. Last night i saw the gray scene with my eyes open and only the light from the bedside clock illuminating the room. I could see the bed linens and I could see my hand with fingers wiggling through the transparent scene . someone told me this was Phosphenes. But no pressure was involved. It was not an after image. So have you heard of such a thing? What is the possible cause? Why does the brain produce these things?