The Effect of Night Eye Mask on Post-operative Pain in Cardiac Surgery Patients

The experimental group will receive protective devices Single use eye masks during nocturnal sleep (Flight Eye-masks; Dreaming, Zhuji City, Zhejiang, China). The caregiver will explain to them that they should wear eye masks during their stay in ICU to ensure rest and instructed patients to use them properly. During the ICU stay, ICU nurses will assist patients with wearing eye masks from 9:00 pm to 7:00 am the next morning.