Yeah. My parents always reprimanded me for "staring" -- and they didn't mean at people, generally, they just thought it made me look weird. They said my brother did it too, they called it "staring at air".
I got known for staring at walls and other blank surfaces when I started changing classes in school, and dealing with it by staring at things that didn't change and losing myself in them or in the colored patterns my retinas put on them. It got to the point where in some places kids would introduce me as "This is Amanda, she stares at walls."
And of course I continued to "stare at air" a lot, which was and remains usually just what happens when I'm not paying attention to (or able to make sense of) visual input.
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams