I don’t see this effect specifically, but it might be related to saccadic movements.

Basically, while your eyes are refocusing from one target to another, they do so in very fast movements that basically make to impossible to see during the movement. So your brain just pretends it doesn’t happen and cuts the blurry parts out of your conscious perception, stretching the non-blurry parts to fill in the missed time.

It’s how, when you glance at the analog clock, the second hand can sometimes appear to linger in place for longer than a second.