目めざとい

i-adjective

sharp-eyed; keen-eyed; observant

Describes someone who quickly notices details or changes, often with a nuance of being alert or shrewd.

• 彼かれは目めざといから、小ちいさなミスもすぐ見みつける。

  He's sharp-eyed, so he spots even small mistakes right away.

• 目めざとい読どく者しゃなら、この矛む盾じゅんに気きづくだろう。

  A keen-eyed reader would notice this contradiction.

i-adjective

easily awakened; light sleeper

Used for someone who wakes up at the slightest noise or disturbance; often appears as 目ざとい人 or 目ざとい性格.

• 私わたしは目めざといので、夜よ中なかに物もの音おとがするとすぐ起おきてしまう。

  I'm a light sleeper, so I wake up right away if there's a noise at night.