The expression “to turn a blind eye” means to deliberately ignore something, choosing inaction over acknowledgement. A manager who notices policy violations but says nothing has turned a blind eye. So has a neighbor who witnesses wrongdoing and quietly looks away.
The expression has one of history’s most documented origins. At the 1801 Battle of Copenhagen, British Admiral Horatio Nelson received a signal flag order from his superior to withdraw from the Danish fleet. Nelson, who had lost sight in his right eye during an earlier campaign, raised his telescope to that eye and told his captain he saw no such signal. He continued the assault and secured a decisive British victory.
Nelson’s calculated act of selective vision passed into everyday speech. Today, the phrase no longer signals defiance in battle, but the quieter choice to ignore what one would rather not confront.
