Without my glasses, I'm as blind as a bat.

沒有眼鏡，我就是個睜眼瞎。

My grandmother is 90 years old and as blind as a bat, but she still loves to listen to audiobooks.

我奶奶90歲了，眼睛幾乎看不見，但她仍然喜歡聽有聲讀物。