believe one's eyes

believe one's eyes  {v. phr.}
1. To believe what one sees; trust one's eyesight. — Used with a negative or limiter or in an interrogative or conditional sentence.
Is that a plane? Can I believe my eyes?
2. To be made sure of seeing something.
She saw him there but she could hardly believe her eyes.
Categories: verb
Source: A Dictionary of American Idioms

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