Why the astronauts can not cry in space?

In fact, the astronauts, of course, also cry. However, as explained by NASA experts, in microgravity, the tears flow down, as on Earth, and remain in place. They gather around the eyeball. Moreover, these tears deliver a lot of discomfort.

According to the scientific explanation, tears should not cause pain. Although we do not know exactly why we cry, tears themselves are softening effect. But, as is known, weightlessness adversely affects human vision, which is caused by displacement of the liquid to the head. It is also possible that dry eye space occurs and the sudden ingress of fluid can cause a burning sensation.

As explained by astronaut Ron Parise, if going to a lot of tears, they come out of the eyes and swim around. In other words, you may be happy to watch as you float in front of your weightless tears.

Source: mirfactov.com/