Why is it worth turning on night mode on your smartphone? Find out how the blue light filter works and how it affects your health and the comfort of using devices.
We live in a world where device screens accompany us almost at every step – from checking the news in the morning, through work, to watching TV series in the evening. However, more and more people are talking about the negative impact of blue light emitted by screens. In response to these concerns, mobile device manufacturers have begun to introduce a blue light filter feature, also known as night mode.
In this article, we will look at how a blue light filter works, what are the benefits of using it, and why you should consider turning on night mode on your phone, especially in the evenings.
Blue light – what is it?
Blue light is a type of visible light emitted by every screen – from smartphones, through tablets, computers, to TVs. Basically, blue light is part of the visible light spectrum, which has a wavelength ranging from about 400 to 500 nanometers. Although this light is naturally present in sunlight and is necessary to regulate our circadian cycle (the so-called clock regulation of sleep), its excess in the evening may have negative health effects.
During the day, blue light helps us stay alert and focused, maintaining our productivity. However, the problem occurs when we are exposed to this light in the evening, especially before going to bed. Prolonged use of screens emitting blue light can disrupt our natural sleep rhythm because blue light inhibits the production of melatonin – the sleep hormone.
How does a blue light filter work?
Blue light filter is a technology that reduces the amount of blue light emitted from the screen. This can be achieved in several ways – by reducing the intensity of the light itself or by shifting the spectrum of colors emitted by the screen. Most often, it darkens blue shades and enhances warm, more eye-friendly colors such as yellow and orange.
In most modern smartphones, the blue light filter is available as a feature in the display settings called “night mode” or “night shift”. When you turn it on, the screen becomes warmer, which reduces the amount of blue light emitted.
Why is it worth turning on night mode on your phone?
The most important reason to turn on a blue light filter is to protect against sleep disorders. Blue light, as already mentioned, inhibits the secretion of melatonin, which may delay falling asleep. Regular use of night mode, especially in the evenings, can help regulate your sleep cycle and make it easier to fall asleep. Research shows that people who limit exposure to blue light before bed sleep better and wake up more rested.
Eye protection
Prolonged use of blue light devices can cause visual fatigue, dry eyes, and even headaches. Reducing your exposure to blue light by turning on night mode can reduce these symptoms and make you more comfortable when using your devices. Night mode also reduces the screen brightness, which may be easier on the eyes, especially in dark rooms.
Long-term health protection
While research is still ongoing on the long-term effects of exposure to blue light, some studies suggest it may contribute to retinal damage and increase the risk of macular degeneration, which could lead to future vision problems. Although there is no clear evidence yet of long-term effects, limiting exposure to blue light can be a step towards protecting your eyesight for years.
Better concentration and performance during the day
People who use night mode, especially in the evenings, may notice an improvement in their concentration levels during the day. Better quality sleep without interference from blue light translates into greater productivity and less daytime sleepiness.
Is a blue light filter sufficient?
While there may be benefits to a blue light filter, it’s worth remembering that it’s not the only solution to overexposure to blue light. There are additional ways you can help protect your eyesight and improve sleep:
- Blue light filter glasses – There are special glasses available on the market that block blue light emitted by screens. They can be especially useful for people who spend long hours in front of a computer or use their phones in the evening.
- Decrease the screen brightness – In addition to turning on night mode, it is also worth adjusting the screen brightness to the surroundings, especially in the evening. A screen that is too bright can additionally burden your eyesight and lead to sleep problems.
- Limiting device use before bed – The most effective way to protect yourself from blue light is to completely avoid devices with screens an hour or two before bed. Instead, you can read a traditional book or do other, less stimulating activities.
The blue light filter, available in most modern smartphones, is a simple yet effective way to protect your eyesight and improve the quality of your sleep. By reducing the amount of blue light emitted, night mode helps regulate your natural circadian rhythm, protect your eyes from fatigue, and reduce the risk of future health problems. Although the filter function itself is not a magic solution to all problems related to long-term use of screens, its regular use can significantly improve the quality of life.
Therefore, it is worth turning on the night mode on your phone today, especially if you often use your devices in the evenings. Regularly taking care of your eyesight and sleep quality will translate into better well-being and health in the long run.
