Influences Of Light Pollutions On Human Health

By Author: Code Blue
Total Articles: 473
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When you are dazzled by reflected lights of glass curtain walls, you may also raise your hand to cover the eyes from lights instinctively. However, you may have no consciousness about the light pollution and its hazards. In recent years, the health effects of light pollution start to draw our attention.

Lead to cataracts. According to the survey results, children who turn on the lights at night to sleep before 2 years old have 55% rate of myopia, while children who sleep in the dark have only 10% rate of myopia. Poor visual environment caused by light pollution is considered as an important factor of myopia. Some studies show that the morbidity of cataracts of people who work and live under white light pollution for a long time is as high as 45%. If eyes are exposed in strong light environment, eye lens functions will be affected and it may lead to cataracts after injury.

Cause upset, anxiety and insomnia. Although people close their eyes in sleep, lights could go through the eyelids and affect sleep. According to clinical statistics, about 5% to 6% insomnia are caused by noise, light and other environmental factors, ...
... among which light factor occupies about 10%. Once people get insomnia, the lack of adequate rest could lead to a deeper level of health problems.

Affect hormone secretion. The light on the retina at night could reduce the formation of melatonin, which is just the important hormone to regulate the circadian rhythm. The night light disrupts hormone secretion rhythms and may lead to imbalance of normal cycle. If children receive too much light exposure, melatonin secretion will be reduced, leading to precocious puberty or genital overgrowth. Light pollution also affects people's mood, which in turn will indirectly affect hormone secretion.

Make people depressed. Ohio State University professor Randy Nelson said at the American Neurological Section School on January 21, too much exposure to light at night may lead to depression. Light pollution can cause dizziness, irritability, depression, physical fatigue and other symptoms similar to neurasthenia.

People who have night work or nightlife for long term suffer from greater damage of light pollution. The longer women work night shifts, the greater chances of developing breast cancer are. If people are exposed by the light in dance hall for a long time, the UV can induce nosebleeds, tooth loss, cataracts, and even lead to leukemia and other cancer. It not only is harmful to eyes but also interferes with central nervous and makes people appear symptoms such as nausea, vomiting, insomnia and lack of concentration.

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