Saccadic masking , also known as (visual)
saccadic suppression , is the phenomenon
in visual perception where the brain
selectively blocks visual processing during eye
movements in such a way that neither the
motion of the eye (and subsequent motion
blur of the image) nor the gap in visual
perception is noticeable to the viewer.
The phenomenon was first described by
Erdmann and Dodge in 1898, [1] when it was
noticed during unrelated experiments that an
observer could never see the motion of their
own eyes. This can easily be duplicated by
looking into a mirror, and looking from one
eye to another. The eyes can never be
observed in motion, yet an external observer
clearly sees the motion of the eyes.
The phenomenon is often used to help explain
a temporal illusion by the name of
Chronostasis , which momentarily occurs
following a rapid eye-movement.
Source: https://en.wikipedia.org/?title=Saccadic_masking
Fascinating isn't it?

Cc: Fynestboi, Richiez