Deceptive designs sending a PC to trial (7,3)

I believe the answer is:

optical art

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'deceptive designs' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'sending a pc to trial' is the wordplay.
'sending' is an anagram indicator (letters are sent to different positions).
'a'+'pc'+'to'+'trial'='apctotrial'
'apctotrial' with letters rearranged gives 'OPTICAL ART'.

Can you help me to learn more?

(Another definition for optical art that I've seen is " illusions".)

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