Is it normal to be able to see things in double vision at will?

Ever since I was little I've always been able to make the image of things split apart into two whenever I wished. It's just become a habit that I do now all the time, like as I'm typing this and I pause to think of the right word to use, I'll look away from the screen at some random object and automatically split it into two. I'll randomly challenge myself with fully splitting apart bigger objects, like the laptop screen in front of me. Does anyone else do this?