Mizaru, Kikazaru, and Iwazaru

Turning a blind eye is an idiom describing the ignoring of undesirable information.

Although the Oxford English Dictionary records usage of the phrase as early as 1698, the phrase to turn a blind eye is often attributed to an incident in the life of Admiral Horatio Nelson.  Nelson was blinded in one eye early in his Royal Navy career.  During the Battle of Copenhagen in 1801 the cautious Admiral Sir Hyde Parker, in overall command of the British forces, sent a signal to Nelson's forces ordering them to discontinue the action.  Naval orders were transmitted via a system of signal flags at that time.  When this order was brought to the more aggressive Nelson's attention, he lifted his telescope up to his blind eye, saying, "I have a right to be blind sometimes.  I really do not see the signal," and most of his forces continued to press home the attack.

-- Wikipedia article on "Turning a blind eye"