Researchers address the mystery of increasing myopia in children

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Myopia is increasing. In the UK, there are a number of children with myopia it has doubled in the last 50 years. Globally, it is projected that by 2050 half the world’s population will be short-sighted.

Although myopia – also known as myopia or myopia – does they work in families, , how to spend too much time indoors have a big influence. For most people, myopia develops from a mixture of genetic and environmental factors. But while evidence shows that modern lifestyle factors contribute to myopia, scientists still don’t quite know why.

For example, research shows that the amount of time a child spends outdoors can play an important role in their lives. risk of developing myopia. Most studies don’t just prove it WHO spend more time outdoors are less likely to develop myopia, studies that require children to spend extra time outdoors during school hours have shown that the rate of myopia decreased compared to children who did not spend more time outdoors.

But researchers are still not entirely sure why this is the case. A theory is that higher levels of outdoor light release more dopamine to retinal receptors (the nerves that process light signals in the eye), thus protecting against myopia. Another suggestion is that the greater amount of physical activity children normally do outdoors prevents myopia. But studies have shown that this is the case little effects.

It has also been suggested that the different patterns and details we see in outdoor and indoor spaces could explain the increase in myopia. For example, one study suggests that the abundance of shots and flat walls in indoor environments is the culprit. It may also be why it is usually myopia more common in urban areas, however, more research is needed to understand this.

Modern lifestyles

Still, modern lifestyles often force us to spend a lot of time indoors. For example, children spend more time in formal education thanks to the increase in school age and the persecution of more people. , which suggests the evidence can cause myopia. However, what aspects of formalized education are causing an increase in myopia is still unknown. Prolonged reading, learning at close distances, time spent indoors and hiking they could all be guilty.

Although one study suggests reading at a distance closer to 25cm may be a risk for developing myopia, reading probably only have one small effect on the development of myopia.

It also has the effect of increased screen use on myopia in children mixed results—Probably because estimating the use of the screen and controlling it in a long-term experiment is difficult. Regardless, more research is needed to understand whether excessive screen use is to blame for higher rates of myopia and why this is the case.

Given the risk factors for developing myopia, there are now also concerns about the possibility of having orders at home and learning at home during the pandemic. worsened children’s eyesight. Although there have not yet been any studies on the effect of children in the UK, early results suggest that the pandemic may cause develop myopia“But it’s expected that.” the effects will be small. It has not yet been seen whether the pandemic will have caused a permanent increase in myopia.

Currently, the best advice to limit the risk of developing is to increase the time spent outdoors, even for 40 minutes a day.


Myopia related to bad sleep and screen time


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Citation: Researchers address the mystery of the increase in myopia in children (2021, June 16) recovered on June 16, 2021 at https://medicalxpress.com/news/2021-06-tackle-mystery-short- sightedness-children.html

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