illusion
A phenomenon in which a person perceives something different from what is actually there, even though there is nothing wrong with the sensory organs. It is distinguished from a hallucination, in which a non-existent object is thought to exist.
一个人认为与实际情况有所不同的现象，即使感觉器官没有错。它与幻觉区分开，其中不存在的物体被认为存在。