Thousands of unconscious eye movements stop us from going blind: "The imperceptible jumps and jiggles known as 'microsaccades' mean that a really steady stare is impossible.
Even when trying to fix a gaze on a stationary target, the eyes are always moving.
Experts have long dismissed these movements as the accidental result of spurious nerve signals. But new research shows they are actively controlled by the same brain region used to scan newspaper columns or track a moving object.
Scientists now think these 'microsaccades' provide a vital function by 'refreshing' images on the retina which would otherwise fade away."
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