Blue light can interfere with the body’s production of melatonin, the hormone that helps regulate sleep. Exposure to blue light in the evening — particularly from screens — may delay the onset of sleep and reduce overall sleep quality, making it harder to feel rested and restored the next day.

Some individuals report experiencing more frequent or intense headaches during extended screen time. While not everyone is affected the same way, blue light has been identified as a possible contributing factor to visual discomfort for those who are sensitive to it.

Straining your eyes over long periods can lead to mental fatigue, which makes it harder to concentrate. Minimizing blue light exposure during deep-focus tasks may help improve visual comfort, allowing you to stay sharp and productive for longer.