LLMs may or may not "reason", for certain definitions of the word (there are many), but this specific thing doesn't differentiate them from us.
t-3
Being tricked by optical illusions is more about the sensory apparatus and image processing faculties than reasoning, but detecting optical illusions is definitely a reasoning task. I doubt it's an important enough task to train into general models though.
LLMs may or may not "reason", for certain definitions of the word (there are many), but this specific thing doesn't differentiate them from us.