not believe eyes

not believe (one's) ears

To be shocked or surprised by what one has heard. I can't believe my ears! You're not playing with me, right? I really got the job? Jen didn't believe her ears when she heard her sister say that she was moving to Texas.
See also: believe, ear, not

not believe (one's) eyes

To be shocked or surprised by what one is seeing. Oh, I can't believe my eyes! Are you really throwing the ball in the house right now? Did you really buy me a new car? I don't believe my eyes!
See also: believe, eye, not

not believe one's eyes

Fig. not to believe what one is seeing; to be shocked or dumbfounded at what one is seeing. I walked into the room and I couldn't believe my eyes. All the furniture had been stolen! When Jimmy opened his birthday present, he could hardly believe his eyes. Just what he wanted!
See also: believe, eye, not