noun
blindness in one eye; person blind in one eye; having one eye much bigger than the other
Sensitive term for a person with one blind or noticeably larger eye. Often considered derogatory; use with caution.
彼は子供の頃の事故でめっかちになった。
He became blind in one eye due to an accident when he was a child.
めっかちという言葉は差別的なので使わない方がいい。
The word めっかち is discriminatory, so it's better not to use it.
かため is the standard, neutral word for 'one eye' or 'blind in one eye'. めっかち is a vulgar, sensitive variant.
The exact derivation is uncertain; possibly from め (eye) + かち (an old word for 'one' or 'single'), with sound change.