Univergence
The result of the absence of perception is univergence.
A glass of water is left nearly finished on a hot summer day. The drinker comes back later to find the cup dry.
How a person can stare at something for minutes without moving his eyes and not be able to discern an object or form.
Words written on paper only change when being written or read--else, when not seen, it is not used and thus unchanged.
A person who became vegetarian out of survival's sake, got back to mainland life, no longer wanted meat.