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:5/31/2016)... ... May 31, 2016 , ... ... Houston Healthconnect’s (Healthconnect) regional health information exchange, which enables physicians at SJMC’s two ... their patients from other participating organizations in the exchange. SJMC’s membership in the ...
(Date:5/31/2016)... ... May 31, 2016 , ... CallTrackingMetrics's ... advertising campaigns, to monitor the performance of sales and support staff, and to ... revenue. The software allows customers to record, transcribe, route, document, and report on ...
(Date:5/31/2016)... ... ... The Global Wellness Summit (GWS), an annual conference for international ... travel, spa and beauty in Europe. The organization asked its partner experts in Europe ... researchers - to forecast where wellness is headed in Europe. Predictions range from European ...
(Date:5/31/2016)... ... 2016 , ... Interest is on the rise for using the CRISPR-Cas9 system ... for RNAi hit validation. A key reason may be that high-throughput synthesis—combined with a ... RNA (crRNA) collections in arrayed formats. , Arrayed crRNA screens have ...
(Date:5/31/2016)... , ... May 31, 2016 , ... Dr. Charles A. ... Dentistry of New Jersey in the class of 1986, where he graduated in the ... at his current location in Livingston since 1989. He has been a member in ...
Breaking Medicine News(10 mins):
(Date:5/30/2016)... 30, 2016 Eye expert s ... babies to seek an eye examination ...   Moorfields Eye Hospital Dubai, the first ... London , has identified premature babies as a special concern ... their particular vulnerability to retinopathy of prematurity (ROP). ROP is a ...
(Date:5/27/2016)... , May 27, 2016 ... innovative biopharma company focused on the highly lucrative ... a substantial pipeline of potential first-in-class or best-in-class ... are in development with strategic partners. HCM,s profitable ... fast-growing domestic market. We expect progress of the ...
(Date:5/26/2016)... , May 26, 2016 According to ... Waste Management Market - U.S. Industry Analysis, Size, Share, Growth, ... market in the U.S. was valued at US$ 5.89 Bn ... of 3.4% from 2015 to 2023 to reach US$ 7.99 ... of current and emerging needle free drug delivery devices and ...
Breaking Medicine Technology: