Navigation Links
More time outdoors may reduce kids' risk for nearsightedness
Date:10/24/2011

ORLANDO, Fla. October 24, 2011 A new analysis of recent eye health studies shows that more time spent outdoors is related to reduced rates of nearsightedness, also known as myopia, in children and adolescents. Myopia is much more common today in the United States and many other countries than it was in the 1970s. In parts of Asia, more than 80 percent of the population is nearsighted. The analysis suggests that more exposure to natural light and/or time spent looking at distant objects may be key factors. Today at the 115th Annual Meeting of the American Academy of Ophthalmology Dr. Anthony Khawaja of the University of Cambridge, will present a summary analysis of the evidence. The analysis was led by Dr. Justin Sherwin of the University of Cambridge.

The data included in the analysis was drawn from eight carefully selected studies on outdoor time and myopia in children and adolescents, representing 10,400 participants in total. Dr. Sherwin's team concluded that for each additional hour spent outdoors per week, the chance of myopia dropped by approximately two percent. Nearsighted children spent on average 3.7 fewer hours per week outdoors than those who either had normal vision or were farsighted.

Though the reasons aren't yet clear, the protective effect appears to result from simply being outdoors rather than performing a specific activity. Two of the eight studies examined whether children who spent more time outdoors were also those who spent less time performing near work, such as playing computer games or studying, but no such relationship was found in either study. The amount of time spent on near work is of interest to researchers as another potential cause for the recent uptick in nearsightedness.

"Increasing children's outdoor time could be a simple and cost-effective measure with important benefits for their vision and general health" said Dr. Khawaja. "If we want to make clear recommendations, however, we'll need more precise data. Future, prospective studies will help us understand which factors, such as increased use of distance vision, reduced use of near vision, natural ultra violet light exposure or physical activity, are most important."

Another question, Dr. Khawaja considered is whether boosting outdoor time might stop nearsightedness from getting worse. He cited a recent Chinese study, not included in Dr. Sherwin's analysis, of 80 nearsighted children between the ages of 7 and 11. Forty of them were assigned to spend less than 30 hours on near work and more than 14 hours on outdoor time per week. At the end of the two-year study, children in the intervention group were less nearsighted on average than the 40 control group children who did not follow the special schedule.


'/>"/>

Contact: Mary Wade
mwade@aao.org
510-725-5677
American Academy of Ophthalmology
Source:Eurekalert  

Related medicine news :

1. Children in public housing play outdoors more
2. Move Childhood Back Outdoors This Summer
3. Hospital Programs to Reduce Antibiotic Resistance Working: Studies
4. Early mortality risk reduced up to 40 percent through increased physical activity and sports
5. Discovery of a cell mechanism that reduces effectiveness of breast cancer treatment
6. Can breastfeeding reduce pain in preterm infants?
7. Malaria vaccine candidate, RTS,S reduces the risk of malaria by half in African children
8. Expanding HIV treatment for discordant couples could significantly reduce global HIV epidemic
9. Folic acid supplements in early pregnancy may reduce the risk of severe language delay in children
10. University of Colorado Cancer Center test helps reduce risk of death in advanced lung cancer
11. Exercise Linked to Reduced Worker Productivity
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
More time outdoors may reduce kids' risk for nearsightedness
(Date:2/23/2017)... , ... February 23, 2017 , ... ... announced today that it will soon begin franchising throughout the U.S. starting this ... to help bring the practice of meditation mainstream. Current Meditation will be the ...
(Date:2/23/2017)... , ... February 23, 2017 , ... ... new partnership with the Rhode Island Consortium for Autism Research and Treatment (RI-CART) ... for children with autism spectrum disorder (ASD) to see films in an environment ...
(Date:2/23/2017)... ... February 23, 2017 , ... CALNOC, the nation’s first and only nursing quality ... conference – Empowerment, Value and Collaboration – in Seattle, WA on October 23, 2017. ... Mason Health System in Seattle since 2000. In addition to his role at Virginia ...
(Date:2/23/2017)... ... February 23, 2017 , ... Curemark, LLC announced today ... efficacy of CM-AT in children aged 3-8 with Autism, is now enrolling at three ... enrolling children across the United States. , “There are currently no approved drugs ...
(Date:2/23/2017)... ... February 23, 2017 , ... Thomas Vas-Don suffered from severe injury ... author was able to successfully recover. In “ Origin & Insertion Charts for Massage ... on the principals of massage, anatomy , trigger points and referral pain ...
Breaking Medicine News(10 mins):
(Date:2/23/2017)... WASHINGTON , Feb. 23, 2017  As ... tips.  In addition, the Company is helping people ... through its customized prescription savings programs in all ... Florida Prescription Assistance Program  and  California Prescription Assistance ... tips from Columbia University for nutritious ...
(Date:2/23/2017)... 2017 The top three players ... Healthcare, Koninklijke Philips N.V., and Schiller. Collectively, these companies ... market in 2015. Strong product portfolio and a monumental ... be aiding these players remain leaders in the fragmented ... in the global market are likely to focus on ...
(Date:2/23/2017)... , Feb 23, 2017 Research and ... Devices Market Analysis & Trends - Industry Forecast to 2025" ... ... grow at a CAGR of around 9.2% over the next decade ... report analyzes the market estimates and forecasts for all the given ...
Breaking Medicine Technology: