blind as a mole
Preserved but no longer current.
Moles are not blind, but as they work underground, their eyes are very small. There is a mole found in the south of Europe, the eyes of which are covered by membranes, and probably this is the animal to which Aristotle refers when he says, " the mole is blind.
Era: ca. 1898 (Victorian)
Sources & notes
Reproduced from Brewer’s Dictionary of Phrase and Fable (1898 edition, public domain; archive.org, retrieved 2026-07-31; OCR text, minor errors possible). Reflects the scholarship and attitudes of its era.
Common questions
What does “blind as a mole” mean?
Moles are not blind, but as they work underground, their eyes are very small. There is a mole found in the south of Europe, the eyes of which are covered by membranes, and probably this is the animal to which Aristotle refers when he says, " the mole is blind.
Is “blind as a mole” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.