Navigation Links
Space Travel Might Lead to Eye Trouble: Study
Date:11/8/2011

TUESDAY, Nov. 8 (HealthDay News) -- Astronauts who spend six months or more in space may experience changes in the structures in the back of their eyes, causing their vision to become blurry, according to a new study from NASA.

Researchers found these changes may be the result of prolonged exposure to microgravity and could affect plans for trips to Mars or other long-term manned space voyages.

"In astronauts over age 40, like non-astronauts of the same age, the eye's lens may have lost some of its ability to change focus," said study co-author Dr. Thomas Mader, an ophthalmologist with Alaska Native Medical Center, in a journal news release. "In the space program's early days, most astronauts were younger, military test pilots who had excellent vision. Today's astronauts tend to be in their 40s or older. This may be one reason we've seen an uptick in vision problems. Also, we suspect many of the younger astronauts were more likely to 'tough out' any problems they experienced, rather than reporting them."

In conducting the study, published in the October issue of the journal Ophthalmology, the researchers examined seven astronauts, all around the age of 50, who spent at least six continuous months in space. The study revealed all seven astronauts experienced blurry vision while on the space station. The changes in their vision began roughly six weeks into their mission and continued long after they returned to Earth.

The researchers also found the astronauts also had at least one change in the tissues, fluids, nerves and other structures in the back of their eye.

Since the visual problems only affected astronauts who spent an extended time in space and none of them had symptoms usually associated with increased intracranial pressure (chronic headache, double vision, or ringing in the ears), the researchers concluded the changes in the astronauts' vision were related to microgravity.

The study authors noted how badly microgravity affects vision varies from person to person. They added that more research is needed to explore why this is the case, or why some astronauts are better suited for extended trips in space.

The researchers pointed out that NASA has acknowledged vision problems among its astronauts on long-term missions and currently provides them with special "space anticipation glasses" to improve their vision. Astronauts also undergo comprehensive eye exams and vision testing.

The U.S. National Aeronautics and Space Administration provides more information on microgravity.

-- Mary Elizabeth Dallas

SOURCE: American Academy of Ophthalmology, news release, Nov. 3, 2011


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. NASA-sponsored study describes how space flight impacts astronauts eyes and vision
2. EU $220 million grant supports Mayo-Czech research using space station approach
3. Experiment aboard shuttle Atlantis will test novel therapy to build bone during space travel
4. Let your fingers do the talking: Sexting and infidelity in cyberspace
5. Americas first doctor in space honored by Baylor College of Medicine
6. Improving DNA sequencing: Sponge-like biosensor crams enormous power into tiny space
7. Antibody production gets confused during long-term spaceflight
8. Tissue spacers reduce risk of rectal injury for prostate cancer patients
9. Drug potency -- what happens in space?
10. Deep-space travel could create heart woes for astronauts
11. Spacebound bacteria inspire earthbound remedies
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Space Travel Might Lead to Eye Trouble: Study
(Date:6/25/2016)... ... , ... "With 30 hand-drawn hand gesture animations, FCPX users can easily customize ... Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 hand-drawn pictures into ... Simply select a ProHand generator and drag it above media or text in the ...
(Date:6/25/2016)... , ... June 25, 2016 , ... On Friday, June ... a Bronze Wellness at Work award to iHire in recognition of their exemplary accomplishments ... of the 7th annual Maryland Workplace Health & Wellness Symposium at the BWI Marriott ...
(Date:6/24/2016)... ... 2016 , ... June 19, 2016 is World Sickle Cell Observance Day. In ... benefits of holistic treatments, Serenity Recovery Center of Marne, Michigan, has issued ... Sickle Cell Disease (SCD) is a disorder of the red blood cells, which can ...
(Date:6/24/2016)... Francisco, CA (PRWEB) , ... June 24, 2016 ... ... CitiDent, is now offering micro-osteoperforation for accelerated orthodontic treatment. Dr. Cheng has extensive ... self-ligating Damon brackets , AcceleDent, and accelerated osteogenic orthodontics. , Micro-osteoperforation ...
(Date:6/24/2016)... ... June 24, 2016 , ... EB ... Decision Making in Emergency Medicine conference in Ponte Vedra Beach, FL. The awards ... in Emergency Medicine Practice and Pediatric Emergency Medicine Practice. , “With ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Any dentist who has made an implant supported ... Many of them do not even offer this as a ... laboratory costs involved. And those who ARE able to offer ... high cost that the majority of today,s patients would not ... Zadeh , founder of Dental Evolutions Inc. and inventor of ...
(Date:6/23/2016)... June 23, 2016 Roche (SIX: RO, ROG; ... for its Elecsys BRAHMS PCT (procalcitonin) assay as a ... septic shock. With this clearance, Roche is the first ... integrated solution for sepsis risk assessment and management. ... infection and PCT levels in blood can aid clinicians ...
(Date:6/23/2016)... June 23, 2016 Research and Markets ... Issue 52" report to their offering. ... treatment creates a favourable commercial environment for MedImmune to enter. ... base that will serve to drive considerable growth for effective ... serve to cap sales considerably, but development is still in ...
Breaking Medicine Technology: