Navigation Links
Sunlight exposure plus low antioxidant levels may place older adults at risk for eye disease
Date:10/13/2008

A European study suggests that the combination of low plasma levels of antioxidants and blue light exposure from the sun is associated with certain forms of the eye disease age-related macular degeneration (AMD), according to a report in the October issue of Archives of Ophthalmology, one of the JAMA/Archives journals.

"The retina is vulnerable to the damaging effects of light," the authors write as background information in the article. "While wavelengths in the UV radiation range are largely absorbed by the cornea and lens, the retina is exposed to visible light, including blue light." Animal and laboratory studies suggest blue light may damage the retina and contribute to the development of AMD, which occurs when the area of the retina (macula) responsible for sharp vision deteriorates.

Antioxidant enzymesincluding vitamins C and E, the carotenoids (lutein and zeaxanthin) and zincmay protect against the harmful effects of blue light on the retina. Astrid E. Fletcher, Ph.D., of the London School of Hygiene & Tropical Medicine, and colleagues measured levels of these nutrients in the blood of 4,753 older adults (average age 73.2) who were part of the European Eye Study. Participants also were interviewed about their lifetime sunlight exposure and had photographs taken of their retinas to detect AMD.

Of the 4,400 participants with complete information available, 2,117 did not have AMD, 101 had neovascular (advanced, involving the formation of new blood vessels) AMD and 2,182 had early-stage AMD. Overall, there was no association between blue light exposure and neovascular or early AMD. However, blue light exposure was associated with neovascular AMD in the one-fourth of individuals with lowest antioxidant levels. "In particular, the combination of blue light exposure in the presence of low levels of zeaxanthin, alpha-tocopherol [vitamin E] and vitamin C was associated with a nearly four-fold odds ratio of neovascular AMD," the authors write.

Key recommendations from the results include ensuring the intake of key antioxidants, which can be accomplished by consuming recommended dietary intake levels of vitamin C and zinc and increasing consumption of carotenoid-rich fruits and vegetables, the authors note. In addition, individuals should take steps to reduce the exposure of the retina to blue light, such as wearing broad-brimmed hats and sunglasses when outdoors.

"In the absence of cost-effective screening methods to identify people in the population with early AMD, we suggest that recommendations on ocular protection and diet target the general population, especially middle-aged people," they conclude.


'/>"/>

Contact: Astrid E. Fletcher, Ph.D.
astrid.fletcher@lshtm.ac.uk
JAMA and Archives Journals
Source:Eurekalert

Related medicine news :

1. Sunlight, Vitamin D May Cut Kids Diabetes Risk
2. Sunlight Helps Put Lung Cancer in the Shade
3. A Little Wine, Sunlight Help Boost Womens Health
4. Exposure to sunlight may decrease risk of advanced breast cancer by half
5. As Sunlight Fades, Look Out for SAD
6. Cadmium Exposure Tied to Lung Disease
7. Heat Exposure a Dangerous Summer Threat
8. Prenatal drug exposure linked to sleep problems in children
9. UC research shows risk of ALS exposure in Gulf War veterans is time limited
10. Long-term pesticide exposure may increase risk of diabetes
11. Exposure Therapy Effective in Preventing Post-Traumatic Stress
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/2/2016)... ... May 02, 2016 , ... Eating Recovery Center’s Insight Behavioral Health ... anxiety disorders, has rebranded its eating disorder program under a new name: Eating Recovery ... facility on May 16. , To celebrate, ERC Chicago will host a ribbon-cutting ...
(Date:5/2/2016)... , ... May 02, 2016 , ... ... Data Book for the 2016 Main Residency Match® (“the Match”), the system through ... United States teaching institutions. A record-high 30,750 positions were placed in the 2016 ...
(Date:5/2/2016)... ... May 02, 2016 , ... East Los Angeles dentist , ... can visit Dr. Assili to receive any dental extraction treatment for $40 off the ... June 30, 2016. With the lower price, patients can more easily afford extractions to ...
(Date:5/2/2016)... ... May 02, 2016 , ... ... new Specialty Pharmacy Patient Satisfaction Award that will recognize specialty pharmacies for their ... from Zitter Health Insights’ Specialty Pharmacy Patient Satisfaction Survey compiled throughout 2016. Results ...
(Date:5/2/2016)... PORT RICHEY, Fla. (PRWEB) , ... ... ... experts and medical researchers report that many commonly used prescription medications, including ... loss (1). To mitigate these risks, Novus Medical Detox Center —a ...
Breaking Medicine News(10 mins):
(Date:4/29/2016)... BERLIN , April 29, 2016 ... world-leading glyco-biology expertise, today announces the appointment of Dr. ... Dr. Zurlo is an oncologist with many years ... pharmaceutical and biotechnology industries. His last role was at ... Member of the Executive Board. Previously Dr. Zurlo held ...
(Date:4/28/2016)... , April 28, 2016  While Abbott,s ... complement the company,s valve repair and stent business, ... also places Abbott more firmly into patient monitoring.  ... the fastest growing device areas, with double-digit growth ... recent report,  Advanced Remote Patient Monitoring ...
(Date:4/28/2016)... April 28, 2016 ... George Phillips und Stephen Schmidt ... ArisGlobal®, ein führender Anbieter cloudbasierter ... heute bekannt, dass neue Führungskräfte zum Team ... sind, die vielfältige Erfahrungen mitbringen.  Dies wird ...
Breaking Medicine Technology: