(as) blind as a bat

(as) blind as a bat

1. slang Unable to see at all. After neglecting his vision for years, my grandfather became blind as a bat, unable to even see shadows.
2. slang Having poor vision. I've worn glasses for 20 years, so I'm as blind as a bat now.
3. slang Oblivious to something. Are you blind as a bat? Those two have been flirting all afternoon!
See also: bat, blind

*blind as a bat

 
1. completely blind. (Bats are not really blind. *Also: as ~.) He lost his sight in an accident and is as blind as a bat.
2. not able to see well. I'm as blind as a bat without my glasses.
3. unwilling to recognize problems or bad things. Connie is blind as a bat when it comes to her daughter's disgraceful behavior.
See also: bat, blind

blind as a bat

Quite blind; also, unaware. For example, Without my glasses I'm blind as a bat, or I had no idea they wanted me to take over his job; I was blind as a bat. This simile, based on the erroneous idea that the bat's erratic flight means it cannot see properly, has survived even though it is now known that bats have a sophisticated built-in sonar system. [Late 1500s]
See also: bat, blind

blind as a bat

If someone is as blind as a bat, they cannot see well. Without my glasses I was as blind as a bat. Note: Most bats are active only at night and find their way by sending out sounds and sensing objects from the echoes, rather than by using their eyesight.
See also: bat, blind

as blind as a bat

having very bad eyesight. informal
This expression probably arose from the bat's nocturnal habits and its disorientated flutterings if disturbed by day. The poor eyesight of bats (and less frequently, moles) has been proverbial since the late 16th century.
See also: bat, blind

(as) blind as a ˈbat

(humorous) not able to see well: I’m as blind as a bat without my glasses.
See also: bat, blind
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