From the perspective of modern medicine, closing your eyes can relax your eyes.

From the perspective of TCM health preservation, the liver is the source of eyesight, and if the liver is good, the eyes are good. Liver contains blood, which can provide enough blood and body fluid to nourish eyes; When the liver is not good, the blood and body fluids provided are reduced, and the eyes are not nourished, so they will feel dry. Another significance of liver resuscitation is the influence of eye movement and rest on the liver. Eyes are like switches. Opening eyes can open the qi of liver blood, and closing eyes can rest liver blood. "Hyperopia hurts the liver" and "liver blood deficiency's vision loss" are all about the close relationship between the liver and the eyes.

Closing your eyes can nourish your liver. When the liver is well raised, your eyesight will naturally improve. Therefore, in the sense of TCM health preservation, closing your eyes can hide your liver and rest your eyes at the same time.

Therefore, try to close your eyes when it is completely dark and you can rest, so that your eyes and body can be better cultivated.