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:6/26/2016)... ... ... On June 10-11, 2016, A Forever Recovery, a holistic treatment center for ... Table in Battle Creek, MI, where the rehabilitation facility is located. This annual celebration ... world’s leading providers of cereal and other breakfast foods. Its residents often refer to ...
(Date:6/26/2016)... Orion, Clarkston, Michigan (PRWEB) , ... June 26, ... ... with respect to fertility once they have been diagnosed with endometriosis. These women ... intercourse but they also require a comprehensive approach that can help for preservation ...
(Date:6/25/2016)... ... June 25, 2016 , ... "With 30 hand-drawn hand gesture animations, FCPX users ... - CEO of Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 ... Pro X . Simply select a ProHand generator and drag it above media or ...
(Date:6/25/2016)... ... ... On Friday, June 10, Van Mitchell, Secretary of the Maryland Department of Health and ... their exemplary accomplishments in worksite health promotion. , The Wellness at Work Awards took ... the BWI Marriott in Linthicum Heights. iHire was one of 42 businesses to receive ...
(Date:6/24/2016)... ... 24, 2016 , ... June 19, 2016 is World Sickle Cell Observance Day. ... the benefits of holistic treatments, Serenity Recovery Center of Marne, Michigan, has ... , Sickle Cell Disease (SCD) is a disorder of the red blood cells, which ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... Va. , June 24, 2016 The ... set of recommendations that would allow biopharmaceutical ... (HCEI) with entities that make formulary and coverage decisions, ... the "value" of new medicines. The recommendations ... does not appear on the drug label, a prohibition ...
(Date:6/24/2016)... June 24, 2016 According to ... Type (Standard Pen Needles, Safety Pen Needles), Needle Length ... Growth Hormone), Mode of Purchase (Retail, Non-Retail) - Trends ... report studies the market for the forecast period of ... USD 2.81 Billion by 2021 from USD 1.65 Billion ...
(Date:6/23/2016)... , June 23, 2016  MedSource announced today ... its e-clinical software solution of choice.  This latest ... possible value to their clients by offering a ... preferred relationship establishes nowEDC as the EDC platform ... MedSource,s full-service clients.  "nowEDC has long been a ...
Breaking Medicine Technology: