Why can myopic eyes be astronauts, and don t astronauts need to have very good eyesight?

The selection of astronauts is very strict, usually from the pilot of the jet aircraft, which can be described as one in a thousand, so the physical requirements are also extremely demanding, of course, people with myopia are not able to be selected.

High myopia with a refractive light of more than 600 degrees is almost impossible to enter space, and the overweight endurance adaptation training before entering space requires high-speed rotation in the centrifuge training cabin to simulate the overweight state in space, which may bring the risk of retinal detachment to patients with high myopia. 6 18-year-old teenagers, eyes are in the development period, at this time to pay special attention to the child's eye health, has myopia children must wear appropriate prevention and control glasses, delay the progression of myopia. High myopia does not allow you to become an astronaut, but among scientific researchers, the screening of vision is not so strict.

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Because with the advancement of science and technology, the requirements for myopia are now very low, and the same is true for astronauts, after all, there are other equipment to replace the human eye.

There is no clear indication of thisMyopiaYou can't be an astronaut.

Aerospace activities are a special kind of professional activities, which have the characteristics of special working environment, highly complex vocational skills, and arduous flight tasks. Such a profession requires astronauts.

Not only should they have a healthy physique and good mental quality, but they should also have a high degree of tolerance and stress resistance to the aerospace environment.

At the same time, they should also have profound knowledge and skills. Therefore, all space departments in the world have selected astronauts with a good heart.

The specific content of astronaut selection depends on the spacecraft.

The determination of equipment and space missions is generally divided into four aspects.

1. Basic conditions.

The same as the pilot selection, but with a level of education.

and work ability is more demanding.

2. Medical selection.

In addition to the medical selection conditions for pilots, attention is also paid to the presence or absence of a recessive neuro-endocrine system in the past.

Dysfunction. During the physical examination, the cardiovascular system, vestibular function, and visual system must be thoroughly and carefully examined.

3. Psychological selection.

The selection of mental quality is an important aspect of the selection of astronauts, and it is necessary to find out the personality, emotional stability, mental state, adaptability and coordination of working with others.

4. Endurance selection for aerospace special environment.

In the early days of manned spaceflight, people attached great importance to the selection of endurance in special environments, but with the continuous development of space technology and the environment in manned spacecraft.

Some special environmental factor tests, such as noise, vibration, and temperature, are no longer the main content of the selection. The special environment endurance selection is mainly carried out by the mask to test the ability to adapt to weightlessness and re-adaptation after returning, such as vestibular function test, overweight endurance test, low-pressure hypoxia endurance test, etc.

An astronaut, or astronaut, or astronaut, or astronaut, is a person who has made a career out of space flight or has flown in space. The criteria for determining space flight are not fully harmonized. In the United States, people who travel more than 80 kilometers (50 miles) above sea level are called astronauts.

The International Federation of Aeronautics (FAI) defines space flight as more than 100 km. As of April 18, 2004, a total of 440 people had spent a total of 27,082 crew-days in space, as defined by the United States, and 98 snullifying crew days were shared by walking in space. As defined by the International Aviation Federation, only 434 people are eligible.

The astronauts who went into space came from at least 32 countries.

in Hong Kong and Southeast Asia.

Astronauts are also known as astronauts. As of 2013, there was only the former Soviet Union in the world.

Russia, the United States, and China have the capability to launch manned space missions. Astronauts from other countries need to cooperate with all three countries to complete manned space missions. Since the first human flight in 1961, astronauts from 38 countries have flown into space.

In 2020, my country's Lu Bu clearly stipulated that talents with higher eyesight can be astronauts, but after 2020, due to the skyrocketing myopia rate in my country, the requirements will be relaxed, and the vision will be above it. But at present, people who are nearsighted cannot become astronauts. When it comes to the future, it's fine.

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Nearsightedness cannot be used as an astronaut, however, there is also a category of non-professional astronauts, who are scientists and engineers who go to space to conduct scientific research. These special astronauts can become astronauts even if they suffer from myopia, as long as they are physically healthy, emotionally stable, and have profound professional knowledge. Astronauts are selected from the best pilots, and if you suffer from myopia, you can't even be an airplane pilot, how can you become an astronaut?

The selection of professional astronauts is indeed very demanding, not only to have a wealth of professional knowledge and experience in aircraft piloting, but also to have excellent intelligence and healthy physique. In addition to maneuvering and piloting spaceships during spaceflights, professional astronauts also have to perform special tasks outside the capsule, such as conducting spacewalks, launching or repairing satellites, etc. Every professional astronaut is selected from hundreds of excellent aircraft pilots, and people with myopia are certainly not likely to join the group.

Summary. Hello dear, astronauts' unaided visual acuity should be slightly deviated from the allowable diopter. Laser refractive surgery** can be performed on the corneal photoabnormality, but it can not be re-examined at least three years after surgery.

Hello dear, astronauts' naked eye vision should be slightly deviated from the refractive power allowed. Corneal photoabnormality can be performed by refractive surgery with a sedan car**, but it can be re-examined at least three years after surgery.

But all structures of the eye and retina (should) be free of trauma and malnutrition.

In addition, the eye chart for the physical examination is a ring eye chart.

Hello dear, myopia may have a certain impact on the qualifications to become an astronaut. According to international aerospace medical norms, astronauts need to meet certain physical health standards, with vision being an important consideration. In general, if you have mild myopia and are able to restore your vision to a standard level with glasses or orthokeratology lenses, you may still be eligible to become an astronaut, but your condition will need to be evaluated based on your physical condition and your space program.

Myopia is not a general obstacle to being selected as an astronaut, but astronauts need to maintain a very good body and eyesight because they will be working in extreme physical environments and will need to perform frequent space walking and navigation tasks. If a nearsighted person wants to become an astronaut, they need to make sure that their vision is within the range of international space standards. Each country will have slightly different standards related to astronauts, but in general, candidates are required to have correctable visual acuity of 20 20 or 20 40.

If a myopic person wants to become an astronaut, they need to undergo vision correction surgery such as LASIK and obtain a certificate of recognition to prove that their vision meets the requirements for space operation after the surgery. In conclusion, myopia of the eye does not necessarily become a factor preventing Kaichen from becoming an astronaut, but it must meet international aerospace standards, including the need for myopia to be corrected by surgery and obtain a proof of response.

In general, myopia may affect the astronaut's ability to survive and perform tasks. Because in space, Hangsong instructed Li Tianyuan to often carry out complex tasks, and Ye Chi needed to have good eyesight to identify and operate equipment. In addition, in the environment of ultraviolet radiation and microgravity, myopia of the eye may cause retinal damage, which can affect vision.

However, whether you can become an astronaut needs to be evaluated in combination with other factors.