It is evident that almost all astronauts are experiencing vision impairment that means their eyesight goes blurry and also optic nerve become as a result of changes occurs in their bodies at the time of traveling to space and returning back to earth i.e. long space travels or space flights, this is because of the changes their bodies undergo from space going back to the Earth.
According to a new study and analysis, official personnel responsible for investigation from cosmonauts revealed that microgravity might be causing abnormal movement of the spinal fluid leads to blurry vision. Scientists have researched that astronauts who went for the space mission for a long duration might go blind by the time they reach the planet destination. According to the reports, impaired eyesight is a matter of great concern as vision is one of the most delicate senses that astronaut has to depend upon, furthermore, approximately two-thirds of astronauts who have sent to the space missions for long-duration have returned with one or many eye complications.
According to the official statistics, for the space travelers losing eyesight could be a disaster in the huge Losing the ability to see for the space travelers could be disastrous in the huge hollowness of space, where no amenity of the hospitals other than the first aid kit, therefore it is difficult to resolve the vision problem ahead as not to cause a long-term and permanent impairment. As per Professor of radiology and biomedical engineering at the University of Miami Leonard M. Miller School of Medicine, in Florida Dr. Noam Alperin, at the initial stage, people did not have the knowledge about vision issue, however, by 2010 it became the matter of concern it seems astronauts had numbers of structural changes that were not similar when they returned to earth .
According to the Washington Post, Alperin relied on some grounds that cerebrospinal fluid (CSF) was not properly adjustable to the microgravity of space in an efficient manner as a consequence of this they on seven astronauts brain scans performed high-resolution just prior and just later their long-duration of travel to space. But most importantly, cerebrospinal fluid (CSF) is the crystal clear liquid which floats all over around the brain and spine. Interestingly, cerebrospinal fluid helps to provide or deliver nutrients, remove waste products and also cushion the nervous system from harm, all these are very pivotal to keep one’s eyesight stable throughout i.e. before and after and also during the space mission.