dry eye

Noun

 * 1)  An eye disease caused by decreased tear production; short for.
 * 2)  An eye which is affected by this disease.
 * 3)  An eye which is not crying, i.e. someone emotionally unmoved.
 * There wasn't a dry eye in the audience after her heart-wrenching performance.

Usage notes
dry eye is a negative polarity item, most commonly found in negative sentences.