You go blind every time you look around
During a saccade — the jump of the eye from one point to another — vision is suppressed. You do not see the smear the motion would produce.
Established2 min read
Dodge showed in 1900 that a stimulus flashed during a saccade is much harder to see. Later work pinned a large part of the suppression on the magnocellular pathway, the fast channel for motion, turned down while the eye is in flight. The suppression begins slightly before the muscles move. It is a plan, not a blur that was ignored after the fact.
Add the blinks, which are also suppressed, and a surprising fraction of the waking minute is a shutter. What you experience as a continuous scene is a set of fixations, stitched.
Caveats
- Suppression is strong, not absolute. A very bright flash during a saccade can still be seen.
Sources
- 1Burr D. C., Morrone M. C., Ross J.. Selective Suppression of the Magnocellular Visual Pathway during Saccadic Eye Movements. Nature 371, 1994.