optical illusion noun
: something that looks different from what it is : something that you seem to see but that is not really there
Examples of OPTICAL ILLUSION
- The closer building looks larger than the farther one, but it's just an optical illusion. The two buildings are actually the same size.
First Known Use of OPTICAL ILLUSION
optical illusion noun (Medical Dictionary)
: visual perception of a real object in such a way as to misinterpret its actual nature
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