Navigation Links
High-altitude climbs may cause corneal swelling, but do not appear to affect vision
Date:2/8/2010

Swelling commonly occurs in the corneas of mountain climbers, but does not appear to affect vision at altitudes of up to 6,300 meters (about 20,670 feet), according to a report in the February issue of Archives of Ophthalmology, one of the JAMA/Archives journals.

"High-altitude mountaineering is a popular recreational sport among healthy lowlanders," the authors write as background information in the article. "As a consequence of the exposure to hypobaric atmospheric conditions with a consecutive decrease in oxygen saturation, high-altitude climbing may lead to acute mountain sickness and the rare but potentially fatal high-altitude cerebral edema." Changes to the cornea, the transparent membrane covering the front of the eye, also occur during high-altitude climbs and may cause potentially hazardous vision loss.

Martina Monika Bosch, M.D., of University Hospital Zurich, Switzerland, and colleagues studied the effects of high-altitude climbing on corneal thickness among 28 healthy volunteers climbing Mount Muztagh Ata in western China. The mountaineers were randomly assigned to two different ascending paths, with one group being allotted a shorter time to acclimate before ascending to 6,265 meters. Corneal thickness, visual acuity and blood oxygen levels were measured in climbers before, during and after their ascent, and symptoms of acute mountain sickness were also assessed.

In groups with both patterns of ascent, corneal thickness increased with increasing altitude and decreased after descent, and the amount of decrease in blood oxygen levels paralleled this increase. The group with the shorter acclimatization time experienced a greater increase in corneal thickness. However, no significant decrease in visual acuity was observed in either group.

When controlling for age and oxygen saturation, there was a correlation between symptoms of mountain sickness and corneal thickness. This was possibly due to these individua
'/>"/>

Contact: Martina Monika Bosch, M.D.
martina.boesch@usz.ch
JAMA and Archives Journals
Source:Eurekalert

Page: 1 2

Related medicine news :

1. VivoMetrics LifeShirt Going to South Pole to Uncover Clues to High-Altitude Illness
2. Amilpar - Revenues Increase by 26.5% and Adjusted Net Income Climbs 28.7% in 2008
3. James Chippendale Climbs the Mountain of Life
4. Doctors miss major cause of infertility and obesity
5. Herbal Remedies Can Cause Cardiac Problems
6. No Surprise to David Perecman And Other Personal Injury Attorneys, Vehicles Lead All Causes of Injury at New York Hospital
7. Mental illnesses are second leading cause of time off work in Spain
8. Tobacco Toxin Helps a Protein Cause Lung Cancer
9. How sunlight causes skin cells to turn cancerous
10. Evolving Strains of HIV May Cause Wave of Drug Resistance
11. American Lung Association Report Card: Federal Government Makes Major Strides; Most States Flunk for Neglecting to Prevent Tobacco-Caused Disease
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2015)... ... 28, 2015 , ... Approximately 2,000 United Methodists are expected ... helping children, a thank you to the many creative and generous ways in ... United Methodist initiative to end malaria deaths. , The Columbus Zoo and Aquarium ...
(Date:8/28/2015)... VA (PRWEB) , ... August ... ... Risk Management for Medical Devices:, Understanding the FDA’s Position and Best Practices ... MD, http://www.fdanews.com/cybersecuritymd , This workshop, chaired by internationally renowned expert ...
(Date:8/28/2015)... ... August 28, 2015 , ... Saint ... grade protein with zero fat, carbs, sugar, gluten, lactose or caffeine in a ... for the 2015 SupplySide CPG Editor’s Choice Awards. , Five consumer packaged goods ...
(Date:8/28/2015)... ... August 28, 2015 , ... The Nashville Business ... veterans leading in business. Mr. Troy Mizell, Chairman of the Board at ... Business Journal's 2015 Veterans Awards will recognize Nashville military veterans who, through their ...
(Date:8/28/2015)... (PRWEB) , ... August 28, 2015 , ... Northridge ... on Zoom teeth whitening. For just $199, patients can currently receive a one hour ... in-office teeth whitening procedures, but it includes a number of unique features that can ...
Breaking Medicine News(10 mins):Health News:Saturday’s United Methodist Event at Columbus Zoo Celebrates Imagine No Malaria 2Health News:Saturday’s United Methodist Event at Columbus Zoo Celebrates Imagine No Malaria 3Health News:FDAnews Announces — Software and Cybersecurity Risk Management for Medical Devices: Understanding the FDA’s Position and Best Practices for Compliance, Oct. 14-15 2Health News:FDAnews Announces — Software and Cybersecurity Risk Management for Medical Devices: Understanding the FDA’s Position and Best Practices for Compliance, Oct. 14-15 3Health News:FDAnews Announces — Software and Cybersecurity Risk Management for Medical Devices: Understanding the FDA’s Position and Best Practices for Compliance, Oct. 14-15 4Health News:FDAnews Announces — Software and Cybersecurity Risk Management for Medical Devices: Understanding the FDA’s Position and Best Practices for Compliance, Oct. 14-15 5Health News:Pocket Protein™ Named 2015 CPG Editor’s Choice Award Finalist by Informa’s SupplySide 2Health News:Pocket Protein™ Named 2015 CPG Editor’s Choice Award Finalist by Informa’s SupplySide 3Health News:MyGenetx Board Member Receives Veterans Award 2Health News:Northridge Dentists Dr. Elyson and Dr. Assili Now Offer a Special Promotion on Zoom Teeth Whitening 2
... ... May 26 educators, administrators, legislators and parents will participate in a Literacy ... event is sponsored by Literacy How, Inc. and will take place at ... to 3:30 pm. For further information and to register, contact Kim Herard ...
... ... information they need to properly manage the condition and prevent future stroke. , ... (Vocus) May 15, 2010 ... the Intersocietal Commission for the Accreditation of Vascular Laboratories (ICAVL) for demonstrating excellence in ...
... warn , SATURDAY, May 15 (HealthDay News) -- With ... on parents to pay special heed to the safety ... protection is a concern for people of all ages, ... safety organization, warns that children are particularly vulnerable to ...
... False Claims Act Attorney ... Seminar of the Arizona Chapter of the Association of Certified Fraud Examiners on May 17. ... fighting fraud against the Government, and its unique Qui Tam provisions. , ... Phoenix, AZ (PRWEB) May 15, 2010 -- False Claims Act (FCA) ...
... old, male testosterone levels drop by one to two percent ... diminish. Could there be a link between decreased testosterone and ... from the University of Montreal Department of Psychology, who presented ... pour le savoir (ACFAS). Sekerovic discovered a ...
... A new research facility at Riley Hospital for ... results of laboratory research into new treatments for sick ... grant of nearly $8.5 million to the Indiana University ... former research floor of the Clarian Health hospital into ...
Cached Medicine News:Health News:Wednesday, May 26: Forum Examines State of Literacy In Connecticut 2Health News:UB Neurosurgery Awarded Full Accreditation For Doppler Testing Of Carotid Artery Disease 2Health News:Guard Kids' Eyes Against Long-Term Sun Damage 2Health News:False Claims Act Attorney Tim Terry to Address Arizona Chapter of the Association of Certified Fraud Examiners 2Health News:Middle-aged men: Could dwindling testosterone levels decrease sleep? 2Health News:Renovations at Riley Hospital for Children will boost pediatric clinical research 2Health News:Renovations at Riley Hospital for Children will boost pediatric clinical research 3
(Date:8/28/2015)... , FARUM, Denmark and ... On July 31, 2015 the US Food and Drug Administration ... of Major Depressive Disorder in adult patients who have failed ... current episode. TMS is a non-invasive technique for stimulating neural ... suffering from Major Depressive Disorder. The procedure has been proven ...
(Date:8/28/2015)... y LONDRES, 28 de agosto de ... PHIA) anunció hoy su participación en el  Congreso ... sus soluciones cardiológicas más recientes y novedosas, entre ... que conectan a las personas y la tecnología ... ayudar a diagnosticar, guiar los tratamientos y permitir ...
(Date:8/27/2015)... Aug. 27, 2015  A recent study by ... Journal, compared the Arthrosurface HemiCAP® Wave implant, which ... an "onlay" design implant for isolated patellofemoral disease. ... function and pain scores, none of the patients ... (OA). However, 53% of the patients in the ...
Breaking Medicine Technology:Therapy System for Treating Major Depressive Disorder Receives FDA Clearance 2Therapy System for Treating Major Depressive Disorder Receives FDA Clearance 3Philips presenta nuevas soluciones cardiológicas integradas para desarrollar procedimientos menos invasivos 2Philips presenta nuevas soluciones cardiológicas integradas para desarrollar procedimientos menos invasivos 3Philips presenta nuevas soluciones cardiológicas integradas para desarrollar procedimientos menos invasivos 4Philips presenta nuevas soluciones cardiológicas integradas para desarrollar procedimientos menos invasivos 5Study Demonstrates Dramatic Reduction in Progression of Osteoarthritis with the Arthrosurface "Inlay" Patellofemoral Implant Design Compared to Traditional "Onlay" Implant 2Study Demonstrates Dramatic Reduction in Progression of Osteoarthritis with the Arthrosurface "Inlay" Patellofemoral Implant Design Compared to Traditional "Onlay" Implant 3
... national reference laboratory and a worldwide leader ... offers an extensive test menu of highly ... and anatomic pathology. Owned by the University ... than half of the nation's university teaching ...
... ARUP Laboratories is a national reference ... laboratory research and development. ARUP offers an ... unique medical tests in clinical and anatomic ... ARUP Laboratories' clients include more than half ...
... reference laboratory and a worldwide leader in ... an extensive test menu of highly complex ... anatomic pathology. Owned by the University of ... half of the nation's university teaching hospitals ...
... ARUP Laboratories is a national reference ... laboratory research and development. ARUP offers an ... unique medical tests in clinical and anatomic ... ARUP Laboratories' clients include more than half ...
Medicine Products: