I ask:If illusions exist, they are *created & exist in the mind & not in the reality independent of our minds?

*This is the fully worded Q: I ask: If illusions exist, they are causally created by the process of perception(interaction between the conscious body-mind and the world external to the conscious body-mind). & exist in the mind & not in the reality independent of our minds? How do you think of the idea that illusions exist?
Dictionary definition:

il·lu·sion (-lzhn) KEY

NOUN:

!)An erroneous perception of reality.
2)An erroneous concept or belief.
3)The condition of being deceived by a false perception or belief.
4)Something, such as a fantastic plan or desire, that causes an erroneous belief or perception.
Illusionism in art.
6)A fine transparent cloth, used for dresses or trimmings.

senses 1,2,3 apply but esp sense 1

definition from: http://education.yahoo.com/reference/dictionary/entry/illusion;_ylt=AhB1zgPEs0IVzwN.hW6kCtesgMMF
A new version of the liar’s paradox is cute:
“The idea that illusions exist is an illusion itself.”, but no answer!
This is a metaphysics and epistemology Q; please, only serious Answers.
The topic of what are *illusions is so central to philosophy, that I can point to almost every philosopher that ever lived having discussed it, eg Plato, Aristotle, Descartes, Kant, etcetera. Psychologists have studied the 1st-order kind of illusions generated by the way our nervous system processes stimuli, but philsophers are focused on the 2nd-order kind we generate by imagination,dreams, and cognitive processing of our perceptions and memories.

ILLusions are a fact of reality