Navigation Links
NASA-sponsored study describes how space flight impacts astronauts' eyes and vision
Date:11/3/2011

SAN FRANCISCO November 3, 2011 A new study sponsored by NASA finds that space flights lasting six months or more can cause a spectrum of changes in astronauts' visual systems. Some problems, including blurry vision, appear to persist long after astronauts' return to Earth. The results are affecting plans for long-duration manned space voyages, such as a trip to Mars. The study team included ophthalmologists Thomas H. Mader, MD, of Alaska Native Medical Center and Andrew G. Lee, MD, of The Methodist Hospital, Houston, Texas. Their report is published in October's Ophthalmology, the journal of the American Academy of Ophthalmology

The researchers studied seven astronauts, all of whom were about age 50 and had spent at least six continuous months in space. All reported that their vision became blurry, to varying degrees, while on the space station. Vision changes usually began around six weeks into the mission and persisted in some astronauts for months after their return to Earth. Drs. Mader and Lee agree that the eye abnormalities appear to be unrelated to launch or re-entry, since they occurred only in astronauts who spent extended time in microgravity.

In-depth examination of the seven astronauts revealed several abnormalities. All of the subjects had one or more of the following changes in the tissues, fluids, nerves and other structures in the back of the eye:

  • Flattening of the back of the eyeball (five subjects);
  • Folds in the choroid, the vascular tissue behind the retina, which is the light sensitive area in the back of the eye (five subjects); and
  • Excess fluid around and presumed swelling of the optic nerve (five subjects).

Such abnormalities could potentially be caused by increased intracranial pressure−that is, pressure inside the head. However, none of these astronauts experienced symptoms usually associated with intracranial pressure, such as chronic headache, double vision, or ringing
'/>"/>

Contact: Mary Wade
mwade@aao.org
415-447-0221
American Academy of Ophthalmology
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. Despite Treatment, Employees with Depression Generate Higher Absentee Costs, According to Thomson Reuters Study
2. American Council on Exercise (ACE) Study Reveals Kettlebells Provide Powerful Workout in Short Amount of Time
3. TV drama can be more persuasive than news program, study finds
4. Study carried out into biological risks of eating reptiles
5. Neuroimaging study may pave way for effective Alzheimers treatments
6. Study finds racial gaps continue in heart disease awareness
7. Luth Researchs IndicatorEDG(TM) Study Finds Americans Hopes of Achieving Their Dreams Are Fading
8. First blinded study of venous insufficiency prevalence in MS shows promising results
9. Soothing infants with food focus of childhood obesity study
10. People with anxiety disorder less able to regulate response to negative emotions, study shows
11. American Heart Association Rapid Access Journal Report: Study Finds Racial Gaps Continue in Heart Disease Awareness, Low Knowledge of Heart Attack Warning Signs Among Women
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... 19, 2014 Energy Textiles is ... now available. Celliant, the world’s leading responsive textile, ... pillowcases. , There are a number of benefits ... increased oxygenation and balanced body temperature; which can ... pain relief; enhanced athletic performance; and overall wellness. ...
(Date:12/19/2014)... Santa Rosa, CA (PRWEB) December 19, 2014 ... 2x4 and 5x5 SuperClone Rooms. SuperCloset continues to offer ... grow solutions. Pair one of the new SuperClone Rooms ... truly professional, perpetual, and turnkey indoor hydroponic grow room ... cloner in the world, SuperCloset’s SuperPonic SuperCloner 50 ...
(Date:12/19/2014)... 2014 An evening dress is perfect for ... closet. Discount-Dress.com, a distinguished dresses retailer, has unveiled its new ... in this great shopping platform. Customers can view ... hard work, Discount-Dress.com has been accepted and praised by customers ... easier shopping stage for clients. In order to expand its ...
(Date:12/19/2014)... (HealthDay News) -- New research warns parents that buying an older ... Nearly half of teen drivers killed in the United States ... 11 years old and often lacked important safety features that are ... teen drivers killed in crashes were in cars at least six ... old, 31 percent were in cars 11 to 15 years old, ...
(Date:12/19/2014)... -- Potentially illness-causing E. coli bacteria were found on ... to a new study. Researchers checked cilantro, basil ... markets in Los Angeles and Orange counties in California, ... samples tested, 24 percent were positive for E. coli. ... researchers. Both types of bacteria can cause sometimes ...
Breaking Medicine News(10 mins):Health News:Energy Textiles Launches Celliant Revitalizing Bedsheets 2Health News:SuperCloset Continues to Innovate with New Complete Indoor Grow Room Packages, The SuperClone Rooms are the Newest Addition to the Award Winning SuperRoom Lineup 2Health News:Attractive Evening Dresses Announced by Discount-Dress.com 2Health News:Older Cars a Bad Choice for Younger Drivers 2Health News:E. Coli Germs Found on Farmers Market Herbs 2
... pass,companion bill and send measure to President, ALBANY, ... of the Protecting the Medicaid Safety Net Act of,2008, ... The bill,prevents massive increases in costs for people in ... "Today,s vote is a victory for all New York ...
... antibiotics sufficient to treat eye disease, study finds ... communities with moderate levels of the eye disease trachoma, ... with the antibiotic azithromycin may be sufficient to eliminate ... at the London School of Hygiene & Tropical Medicine,s ...
... needed to prove that oversulfated chondroitin sulphate caused deaths, ... researchers say they,ve confirmed that lots of the blood ... a man-made chemical called oversulfated chondroitin sulfate. , ... Biotechnology . , And, according to a paper published ...
... at the Congressional Gold Medal ceremony in the Capitol ... Below are the,Speaker,s remarks:, "Good morning. It is ... the House and Senate to honor Dr. Michael DeBakey. ... Representative Al,Green, and others who worked with them for ...
... 75-cent Per Pack Increase Would Help Raise $390 ... Ohio leaders should,fund a proposed economic stimulus plan ... prevention funds, recommends a report released,today by the ... this tobacco tax alternative would reduce smoking, save ...
... Corporation,(NYSE: STE ) today announced that its Board ... amount of $0.06 per common share. The,dividend is payable ... close of,business on May 14, 2008., About STERIS, ... a healthier today and,safer tomorrow through knowledgeable people and ...
Cached Medicine News:Health News:AARP Thanks New York's Representatives for Supporting Bill to Protect People in Medicaid 2Health News:Annual Trachoma Treatments May Be Unnecessary 2Health News:Researchers Identify Contaminant in Tainted Heparin 2Health News:Researchers Identify Contaminant in Tainted Heparin 3Health News:Pelosi: 'By Literally Fixing Broken Hearts, Dr. DeBakey Has Given Hope and Health to Millions' 2Health News:New Report: Increasing Ohio's Tobacco Tax Would Fund Economic Stimulus Plan and Preserve Highly-Successful Tobacco Prevention Program 2Health News:New Report: Increasing Ohio's Tobacco Tax Would Fund Economic Stimulus Plan and Preserve Highly-Successful Tobacco Prevention Program 3Health News:New Report: Increasing Ohio's Tobacco Tax Would Fund Economic Stimulus Plan and Preserve Highly-Successful Tobacco Prevention Program 4Health News:STERIS Corporation Declares Regular Quarterly Dividend 2Health News:STERIS Corporation Declares Regular Quarterly Dividend 3
(Date:12/19/2014)... Dec. 18, 2014  Decision Resources Group finds that ... States will increase to a value of ... driven by expansion in the large direct energy device ... be increasingly adopted due to the advantages they offer ... key findings from Decision Resources Group,s coverage of the ...
(Date:12/19/2014)... Ky. , Dec. 18, 2014 Baptist Health ... States to receive full Atrial Fibrillation with Electrophysiology ... Care (SCPC). Atrial fibrillation is the most common ... that in some cases can lead to stroke and possible ... United States have atrial fibrillation and the numbers ...
(Date:12/19/2014)... and LYON, France , Dec. 19, ... LLY ) and Adocia (Euronext Paris: FR0011184241 – ADOC) ... an ultra-rapid insulin, known as BioChaperone Lispro, for treatment ... BioChaperone Lispro relies on Adocia,s proprietary BioChaperone® technology and ... and Adocia will develop BioChaperone Lispro with the goal ...
Breaking Medicine Technology:U.S. Laparoscopic Device Market Will Reach Over $4.3 Billion by 2023 2U.S. Laparoscopic Device Market Will Reach Over $4.3 Billion by 2023 3Baptist Health Lexington First in the Nation to Receive Atrial Fibrillation with EPS Accreditation 2Baptist Health Lexington First in the Nation to Receive Atrial Fibrillation with EPS Accreditation 3Lilly and Adocia Announce Alliance to Co-Develop Ultra-Rapid Insulin Based on BioChaperone Technology 2Lilly and Adocia Announce Alliance to Co-Develop Ultra-Rapid Insulin Based on BioChaperone Technology 3
... Triad Plus PVP-I Prep Gel ... PVP-I Prep Gel is film forming, ... action that has been known to ... gram-positive bacteria (including antibiotic resistant), fungi, ...
... HIBICLENS bonds with ... a protective, germ-killing field. ... fast acting antimicrobial effect, ... irritation potential promotes compliance ...
Aplicare's disposable 1-ounce pouches are designed for individual application and are ideal for reducing waste. They are used in nursing homes, home healthcare settings, blood banks, laboratories, em...
Aplicare's disposable 1-ounce pouches are designed for individual application and are ideal for reducing waste. They are used in nursing homes, home healthcare settings, blood banks, laboratories, em...
Medicine Products: