Photo from open sources
It’s no secret that being outside our planet extremely negatively affects human health. Muscles of the astronauts atrophy, the skin becomes thinner, the skeleton becomes fragile, eyesight spoils. And if muscle mass and bone hardness gradually are restored upon the return of man to Earth, then myopia acquired as a result of such flights can be corrected only by surgical method.
So, American John Lynch Phillips, aboard International Space Station for over six months, noted that his visual acuity fell from 1 to 0.1 points. And this is far from single example. Scientists have determined that about eighty percent of astronauts are subject to significant loss of vision. All possibly the lack of gravity and intracranial pressure, and also cosmic radiation. As you know, closing your eyes in orbit, astronauts see not blackness, but flashes of light, since space rays are constantly bombarding the optical nerves.
Examining Phillips, doctors found that the shape of his eyes changed: the back of the eyeballs flattened, the retina advanced, folds of the choroid formed inflamed nerves. Apparently, it is precisely zero gravity that leads to such deformation of the visual organs. In the appendage – space radiation, very harmful even to human skin, is stable blinds earthlings in orbit.
A photo from open sources
After a flight to Mars, astronauts will return to Earth crippled
Astronaut visual impairment is considered one of the main reasons which makes traveling to Mars very difficult if not to say more. Only a flight there will take about the earthlings about nine months, and yet it will take some time to to do something on the Red Planet, and then fly as much back. One can only guess how much explorers “put” their vision for such an expedition, not to mention other health problems. And about the development of the planets outside the solar system, one does not have to speak at all.
Biomedicine experts suggest that the problem is theories can be solved with special head implants, regulating intracranial pressure and blood flow, but their development and testing may take, according to scientists, more than one decade.
Mars Health
