While observing a client's face, which assessment finding requires immediate intervention by the nurse?

A. Corneas are jaundiced. Jaundiced corneas indicate liver dysfunction, but it is not typically an immediate life-threatening condition. B. Eyelids are matted and crusted. This suggests an eye infection but does not require immediate intervention unless there are signs of systemic infection or severe pain. C. Face is flushed and diaphoretic. Flushing and sweating can indicate fever, anxiety, or other conditions, but it is not immediately life-threatening. D. Oral mucosa is cyanotic. Cyanosis indicates hypoxia and requires immediate intervention as it suggests a lack of adequate oxygenation.