Answer:
Ganzfeld effect
Explanation:
Our eyes are constantly moving because it is the change in stimulation that leads to accurate perception. What occurs when a situation is created that leads to a constant stimulation of cells in the retina
Wikipedia explains Ganzfeld Effect as a phenomenon of perception caused by exposure to an unstructured, uniform stimulation field. The effect is the result of the brain amplifying neural noise in order to look for the missing visual signals.
It seems that parts of the image may disappear, Leads to one perceiving a grey field.
