red–eye 
/ˈrɛdˌaɪ/ noun
plural red–eyes /ˈrɛdˌaɪ/ noun 1 [count] US, informal : a flight in a passenger airplane that happens late at night or that continues through the night
▪ He caught/took the red-eye to Los Angeles. ▪ a red-eye flight 2 [noncount] : the appearance of a person's eyes as red in a photograph that was taken with a flash
▪ The digital photo editing program can be used to remove red-eye.
▪ He caught/took the red-eye to Los Angeles. ▪ a red-eye flight
▪ The digital photo editing program can be used to remove red-eye.
