OK so this is cool. I knew most of these but blinking was not even on my radar! #science
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@wolfwoman
They left off the cool fact about "saccades" vs "tracking."
If you try to move your viewpoint across your field of vision, it will take multiple short jumps called "saccades." It's impossible to move your eyes smoothly from one side to another -- unless you are watching a moving object. Then you can "track" it, and your eyes will follow it smoothly.
You can tell when someone is tripping, because the visual hallucinations allow them to track when there are no moving objects to see.
@EileenKCarpenter In law enforcement, we learned about horizontal nystagmus. All part of the same mechanism, when screwed up by chemicals ;)