Definition
To personally witness something, especially something that is difficult to believe without seeing it yourself.
親眼看見
I need to see him sign the contract with my own eyes before I believe it is real.
我需要親眼看到他簽署合同，才能相信這是真的。
She said she saw the car crash into the wall with her own eyes.
她說她親眼看到那輛車撞上了牆。
It wasn't until I saw him perform the difficult stunts with my own eyes that I believed he was a real stuntman.
直到我親眼看到他表演那些高難度的特技，我才相信他是一名真正的特技演員。