Health Problems With Using Smartphones Late at Night

One of the major changes experienced by mankind in the last 15 years is the emergence of smartphones. Smartphones are deep in our lives. Smartphones have not only brought about tremendous changes in the social, cultural, political, and economic aspects of humanity, but also cause health problems. This is the first time in human history that people have looked directly at a shining light source for long periods. The smartphone light is not a problem during daytime, but its intensity is bright enough to affect body function at night. However, we remain ignorant of the long-term problems it will cause for health. In terms of sleep, looking at smartphones for lengthy periods in bed delays the body's circadian rhythm and hinders the quality and amount of sleep. When bright light is transmitted through the eyes to the brain at night, melatonin hormone secretion is suppressed in the pineal gland, making it difficult to fall asleep; the circadian rhythm is delayed, making it difficult to wake up in the morning and to get enough sleep. This effect of light becomes serious when its intensity is strong and it has a blue wavelength.