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:12/5/2016)... Petersburg, Fla. (PRWEB) , ... December 05, 2016 , ... ... concussions have on the growing brains of young athletes. Over the course of three ... the head through unique mouth guards. The mouth guards, equipped with special sensors, will ...
(Date:12/5/2016)... NY (PRWEB) , ... December 05, 2016 , ... ... to use a patent-pending blend of L-Citrulline and glutathione to enhance production of ... a combination that studies have shown to produce NO twice as effectively and ...
(Date:12/5/2016)... ... December 05, 2016 , ... Eating disorders ... goal of Castlewood Treatment Centers has always been to promote the power of ... people as possible. In that spirit, Castlewood has announced two new hires, both ...
(Date:12/5/2016)... ... December 05, 2016 , ... U.S. Apple Association (USApple) ... part of the second annual Apples for Education: Buy an Apple, Help a ... providing healthy food for students to take home to their families; solar technology to ...
(Date:12/5/2016)... ... December 05, 2016 , ... ... Partners ("GPP") portfolio company, today announced it has acquired the assets of ... was previously a subsidiary of Chiltern International and focuses on clinical trial ...
Breaking Medicine News(10 mins):
(Date:12/5/2016)... India , December 5, 2016 According ... by Treatment modalities (Chondrocyte Transplantation, Growth Factor Technology, Tissue Scaffolds, Cell-free ... published by MarketsandMarkets, the market is projected to reach USD 779.8 ... a CAGR of 13.5% during the forecast period of 2016 to ... ...
(Date:12/5/2016)... and PUNE, India , December 5, ... by Allied Market Research, titled, "Global Cancer Biomarkers Market - ... of cancer biomarkers market is projected to reach $15,737 million ... of 13.3% from 2016 to 2022. Omic technologies segment accounted ... and is expected to maintain its dominance during the forecast ...
(Date:12/5/2016)...  CVS Health, the nation,s largest pharmacy innovation company, ... of 100 percent on the Corporate Equality Index (CEI) ... annual national benchmarking survey and report on corporate policies ... Human Rights Campaign Foundation. "Our company,s ... customers and suppliers bring to CVS Health," said ...
Breaking Medicine Technology: