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The truth about blue light: Why do we need to worry about the health effects of blue light?
With the advancement of technology and the increasing popularity of electronic devices, the health effects of blue light have become a topic of concern to many people. High-visibility visible light (HEV light) consists primarily of blue light with wavelengths between 400 and 450 nanometers, which has a variety of potential negative effects, particularly on physical and mental health.
Blue light is thought to have an impact on biological rhythms and retinal health, and may even contribute to age-related macular degeneration.
The increase in blue light sources, especially the use of LED displays, is often more intense in brightness and color temperature than traditional light sources. Although modern technology allows us to use these devices conveniently, it also comes with health concerns. Many experts have conducted in-depth research on the potential harm of blue light and discussed its short-term and long-term effects on the body.
The sources and effects of blue light
Blue light mainly comes from natural sunlight and various types of artificial light sources. Especially in LED lighting systems, the proportion of blue light is relatively higher. Although the existence of blue light is not new, the application of modern technology has greatly increased the level of exposure. Different studies have shown that blue light can damage the retina and may lead to vision problems such as age-related macular degeneration.
Intense blue light exposure is associated with short-term effects on the retina and long-term effects that may lead to age-related macular degeneration, according to a report.
Physiological effects: Disturbance of biological rhythms
Human biological rhythm is the main regulatory mechanism of sleep and wake cycles, and the role of blue light in this process cannot be ignored. Studies have found that blue light from screens can interfere with our biological clocks at night, causing insomnia or poor sleep quality.
Harvard Health Publishing states that exposure to blue light at night can have significant negative effects on sleep.
In addition, blue light stimulates melanin in the retina, and this stimulation inhibits the secretion of melatonin, thus affecting sleep. “Even extremely low levels of blue light exposure can cause disruptions in circadian rhythms and sleep,” a report states, making this a common challenge in modern life.
The rise and controversy of blue light filters
To combat the health effects of blue light, various blue light filters have emerged on the market that claim to filter harmful blue light. Although these lenses are designed to protect the user's eyes, whether they can actually bring substantial benefits is still open to question.
Many experts believe that popular blue light filters on the market may not be as effective as advertised, especially in preventing eye fatigue.
Although filter glasses can filter blue light to a certain extent, whether it is worth wearing to prevent the potential harm of blue light is still controversial. "Current evidence is insufficient to support the claim that these filters prevent eye disease." One expert pointed out.
Limitations of the study and future prospects
Current research results on the effects of blue light are mixed, and some research methodologies are flawed. Therefore, further empirical research is needed to evaluate the true impact of blue light on health. In addition, whether blue light protection measures, such as the cute color temperature mode of the monitor or the blue light filter designed for night, can truly protect people's health, the specific effect is still not fully confirmed.
Although outdoor workers are wary of long-term exposure to blue light, in urban life, continued exposure to blue light is an unavoidable reality.
As technology further develops, we may be able to find more effective solutions to manage our daily exposure to blue light rays to reduce its potential impact on health. But before that, how should we balance the contradiction between technological convenience and health risks?
