What are eyes for?

The eyes are the most important organs in human senses, and about 80% of the knowledge in the brain is obtained through the eyes. Reading books, looking at pictures and appreciating paintings, appreciating people and enjoying beautiful scenery all need eyes. The eyes can distinguish light with different colors and brightness, and convert this information into nerve signals and transmit them to the brain.

The human eye is approximately spherical and located in the orbit. The average diameter of normal adults is 24mm, the vertical average diameter is 23 mm, and the front end protrudes from the orbit 12 ~ 14 mm, which is protected by eyelids. The eyeball includes the wall of the eyeball, the inner cavity of the eye, contents, nerves, blood vessels and other tissues.

Extended data:

protect eyes

1. Long-term close eye use in poor ambient light is the main cause of myopia and myopia deepening, which should be avoided as much as possible. In addition, when using eyes at close range, the body should be at rest, and the eyes should keep a proper distance (not less than 30 cm) from the book/computer.

2, more outdoor sports/activities, while promoting blood circulation, eyes will have more hyperopia time, and can also help relax eye muscles/nerves, which is self-evident for vision protection.

3, due to the growth of age, the physiological function of the eyes will naturally decline, which is normal. However, if we can eat nutrition reasonably in our daily life (not partial eclipse), do more exercise and watch less TV/computer, it will help to slow down the decline of vision.

Baidu encyclopedia-eyes

Baidu Encyclopedia-Protecting eyesight