Men often stay up late to cause their eyes to become 80 years old, causing concern. Many people are used to playing with their phones before going to bed, or even after turning off the lights. However, there are at least 5 harms: (1) damage to the macular area of the eye, (2) affect the health of the spine, (3) affect sleep quality, (4) affect brain health, and (5) lead to mood disorders. (Health Times)
Source: China Youth Daily