Antonyms of perception :
ignorance, inexperience, misconception, rudeness, illiteracy, misapprehension, misunderstanding, unfamiliarity, density, dullness, obtuseness, brainlessness, folly, foolishness, idiocy, imbecility, mindlessness, silliness, simplemindedness, simpleness, stupidity, witlessness, illogic, irrationality, unreasonableness, unsoundness, craziness, insanity, lunacy, madness, preposterousness, senselessness, zaniness, miscomprehension, misinterpretation, misperception, incomprehension, noncomprehension.
Examples of usage:
Call it character, and the perception of it. "An Ocean Tramp", William McFee.
It must be allowed for Euphra, that she seemed to have gained some perception of the fact. "David Elginbrod", George MacDonald.
What we call actual 'Sense' is the perception of the Soul,- - a perception which cannot be limited to things which are merely material, inasmuch as it passes beyond outward needs and appearances and reaches to the causes which create those outward needs and appearances. "The Life Everlasting: A Reality of Romance", Marie Corelli.