Assertion: visual illusion | /r/HasProperty | optical illusions
Facets:
Source sentences:
text: Illusions may occur with any of the human senses, but visual illusions (optical illusions) are the best-known and understood.
text: Geometrical-optical illusions are visual illusions, also optical illusions, in which the geometrical properties of what is seen differ from those of the corresponding objects in the visual field.