Scientists believe flickering eye movements 'refresh' images on the retinaFrom The Daily Mail:
Unconscious flickering eye movements once thought to be random 'motor noise' may in fact be necessary to stop us going blind, a study has shown.
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 microsaccades provide a vital function by 'refreshing' images on the retina which would otherwise fade away.
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