That which is falsely or delusively believed or propagated; false belief; error in belief.
A false belief that is resistant to confrontation with actual facts.
A fixed, false belief, that will not change, despite evidence to the contrary.
The state of being deluded or misled, or process of deluding somebody.
That which is detected by the five senses; not necessarily understood (imagine looking through fog, trying to understand if you see a small dog or a cat); also that which is detected within consciousness as a thought, intuition, deduction, etc.
Vision (ability)
Conscious understanding of something.
The organisation, identification and interpretation of sensory information.
Acuity