What's the term for flickering eye movement
If you're looking out of the window of a moving train and at things as they go by (rather than a single object that you're leaving behind), your eyes appear to be flickering. There's a specific term for this.. which I can't remember!
Saccades, I believe. You can also have 'micro-saccades' which are what the eye does to maintain a constant image; you'd be blind otherwise.