Are you seeing lightning flashes (and there is no thunderstorm)? Do you feel like you are constantly living in a tornado of dust?
You’re not losing it. Is may be merely a visual phenomenon.
If you have seen something moving across your field of vision, or you think you are seeing ants moving on the table, you could be experiencing floaters. A floater is a universal term for specks, threads or cobweb type images that you see drifting in your vision. Sometimes when you have floaters you will also notice a flash of light similar to a camera’s flash.
Eye flashes and floaters can be harmless, but they can also be a warning sign trouble is on its way.