sharp eye

Black is considered a tough, unsentimental executive with a sharp eye on the bottom line.

Whether it's happening here or not is something we'll keep a sharp eye on.

A sharp eye was kept on all arrivals from abroad, and a friar, fresh from Portugal, was hanged in his cowl at Limerick.

Keeping a sharp eye ahead, I soon came in sight of a cabin sitting lonely and forlorn in the middle of a small clearing.

With his sharp eye he must have been quick to draw a bead with a gun; but his eye, though sharp, was pleasing.

Your burglars keep a sharp eye on us, at all events, Mr. Bathurst.

His guardian must have a sharp eye for picking holes, if he can find any in Morville.