He had sharp eyes, but of course that was his job.

He would have to keep a sharp eye on him.

They kept a sharp eye out for the two men, but did not see them.

Those sharp eyes would see whatever there was to be seen.

Keep a sharp eye open, and go on as they were!

She was a rather pretty French girl, with dark hair and sharp black eyes.

It took a sharp eye and more than a little experience.

Keep a sharp eye on this one until we know more about him, he sent.

After we pass the third one, we'll need to keep a sharp eye out.

His sharp black eyes didn't miss anything in my face.