Outdoor Time Nearsightedness
October 25, 2011 by staff
Outdoor Time Nearsightedness, Children and adolescents and be outdoors lower the risk is the development of myopia (nearsightedness), researchers at the University of Cambridge, England, reported at the 115th annual meeting of the American Academy of Ophthalmology, Orlando , Florida. The study was led by Dr. Justin Sherwin and presented by Dr Anthony Khawaja. Khawaja explained that myopia is more common in the United States today than thirty or forty years. In parts of Asia over four estuaries of the population has myopia.
The latteranlysis seems to show that the amount of time children and adolescents are exposed to natural light and how long they spend looking at the impact of distant objects in their quality of vision.
Dr. Justin Sherwin and the team carried out a meta-analysis of eight studies that focused on myopia in children and adolescents and the time spent outdoors. The studies included a total of 10,400 people.
The team calculated that there was a 2% drop in the risk of myopia for each additional hour spent outdoors each week. It was reported that the average child spends 3.7 hours myopic least outdoors each week compared to children who have no vision problems or those who are farsighted. Hyperopia, also known as farsightedness, is the ability to see distant objects more clearly than near objects.
Scientists believe that the protective effect does not come from any particular activity, but by simply being outdoors. Two studies that examined whether people tried to spend more time was also spent less time in close work, such as studying or playing with a monitor in front of them – there was no evidence of such a relationship, either in study . Researchers are studying whether the time spent working around the long term could have an impact on a child’s vision.
Dr. Khawaja said:
“The increase in children’s time outdoors can be an easy and economical, with important benefits for vision and general health. If we want to make clear recommendations, however, we need more accurate data.
Future prospective studies will help us understand what factors, such as greater use of distance vision, reducing the use of near vision, natural ultraviolet light exposure or physical activity are the most important. ”
The researchers also asked if the myopic children could benefit from extra hours outdoors – that this leg of his increasingly severe myopia. Dr. Khawaja said a study in China of 80 children between 7 and 11, all with myopia. They were randomized into two groups of 40:
The intervention group – who posed no more than 30 hours each week at work up close and outdoors at least 14 hours
The control group – who had no intervention. They were not told that the change or the monitor of your time outdoors or time to do near work.
They found that after 24 months in the intervention group were less myopic than the control group. This study conducted in China was not one of the teamanlyzed 8 and Khawaja.
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