According to new research, 70 % of astronauts who spent six months to 12 months in the International Space Station (ISS) have experienced a major change in vision due to “cosmic disorder -related neuros syndrome”. I did.
Sans contains symptoms such as swelling of the optic nerve, flat behind the eyes, and general changes in vision. It occurs when the body fluid in the body shifts while being exposed to micro gravity conditions, thereby pressure on the eyes.
Good news is that these changes often reverse after the astronaut returned to the earth, and in some cases, it is sufficient to manage symptoms while symptoms occur. However, the long -term impact of long -term exposure to micro -gravity remains uncertain, which has a major issue to space agencies aiming to see the mission on Mars.
Finding a solution is a top priority to ensure astronauts on astronaut’s extended journey, as there are no presented prevention strategies or treatment strategies.
Space organizations have been aware of SAN since the early 2000s, and researchers have been actively grasping certain dynamics in terms of conditions and trying to solidify potential solutions. One of the most early research on this topic is for Russian astronauts who participated in a long -term mission at Meal Space Station, and reported the same eye change, but the condition is still identified as Sans. I didn’t. NASA was officially recognized in 2011 and named syndrome, defining it as “clear eyes, neurological, neural imaging results.” The main cause of Sans is that the body fluid shifts toward the head due to micro -gravity, increasing pressure on the brain and eyes. However, the exact mechanism is under investigation.
“A science team led by Santiago Costantino at Montreal University has been proposed in a new study, saying,” Several theories have been proposed, such as shifts of blood circulation, exposure to CO2, and exercise under microscopic conditions. ” I am. “Understanding the changes in the mechanical characteristics of eye tissue is not only throwing new light in pathological physician of the disease, but also the risk of developing irreversible eye damage, and individuals in the occurrence of SANS. It may be potentially useful for both identification.
In their research, Costantino and his team analyzed data from 13 astronauts who spent 5-6 months on the International Space Station. The average of 48 -year -old groups include astronauts in the United States, Europe, Japan and Canada. 31 % were women, and eight participated in the first mission.
Researchers examined three important eye measurements before and after the space flight. Eye hardening that reflects the rigidity of the eye tissue, the internal pressure, the fluid pressure in the eye, and the fluctuation of the intraoctular pressure with each heart beats.
They measured the rigidity of the eyes using special imaging technologies and took more clear photos of the containable film, which is a layer of blood vessels in the eyes. In the other two measurements, we used glasses, a general tool to confirm the pressure inside the eyes.
This study has revealed a significant change in astronauts’ biological characteristics of astronauts, such as a 33 % decrease in the rigidity of the universe, a decrease of 11 % of internal pressure, and a reduction of 25 % of the eye amplitude. 。 These shifts were associated with symptoms such as reduction of eyes, changes in focus fields, and in some cases, or swelling of the retina folding.
In addition, researchers have discovered that five astronauts have a thickness of the context membrane of over 400 micrometers. This is higher than usual. Usually, the thickness of the average pulse film for healthy adults is 200-300 micrometers. Interestingly, this change seemed to be unrelated to age, gender, or astronaut experience.
Researchers and space organizations are working on measures and treatments, such as intervening, nutrition of drugs, and tools that use negative pressure to the lower body to separate liquids from their heads.
Such studies help accelerate solution development by improving the understanding of the effects of syndrome on the body.
“The changing changes in the mechanical characteristics of the eyes may be useful as a biomarker to predict the development of SAN,” Costantino stated in a statement. “This helps to identify a risky astronaut before causing serious eye problems during a long -term mission.”
