Strauss-Kahn's sudden, astounding, and very definitive-seeming fall might make an optical illusion of his comeback rise.
I didn't for a moment believe that Terry had "seen a ghost," or had an optical illusion.
And yet we are asked to believe that all this is merely an optical illusion.
The burning atmosphere, the motionless air caused doubtless the optical illusion.
This is an optical illusion, but it serves the tracker's purpose.
But colour for colour's sake or optical illusion did not long hold him.
"Then it was an optical illusion, and I am going out of my mind," said Enid despairingly.
The rapid progressive motion sometimes assigned to them may be regarded as the natural result of an optical illusion.
An optical illusion is discovered in a single instance of the phenomenon.
"An optical illusion," answered Mary Grey, in a low, tremulous tone and with her face carefully kept in the shadow.
mid-14c., "act of deception," from Old French illusion "a mocking, deceit, deception" (12c.), from Latin illusionem (nominative illusio) "a mocking, jesting, irony," from illudere "mock at," literally "to play with," from assimilated form of in- "at, upon" (see in- (2)) + ludere "to play" (see ludicrous). Sense of "deceptive appearance" developed in Church Latin and was attested in English by late 14c. Related: Illusioned "full of illusions" (1920).
illusion il·lu·sion (ĭ-lōō'zhən)
An erroneous perception of reality.
An erroneous concept or belief.
The condition of being deceived by a false perception or belief.
Something, such as a fantastic plan or desire, that causes an erroneous belief or perception.