What are Blue Light Filter Glasses? Why Used?
Blue light glasses filter the blue light emitted by electronic devices, which is potentially dangerous to the eyes. Blue light is a type of light that the human eye can see. Since blue light has a short wavelength and high energy, it penetrates the eye more. Therefore, almost all blue rays pass through the cornea and reach the retina. Naturally, the sun, artificial lighting and digital devices such as phones, tablets, computers and televisions are sources of blue light. Excessive exposure to blue light affects the light-sensitive cells in the eye. Experts associate excessive exposure to blue light with eye damage.
Blue light glasses have a special coating that reduces the blue light beam reaching the eye by a certain amount. It has been shown that it may be especially effective in regulating circadian rhythm. Even though blue light protection glasses filter the blue light that directly enters the eye, it cannot be said that they definitely protect and improve eye health.
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What are Blue Light Protection Glasses?
Blue light protection glasses are medical devices that use special glass to block or filter some of the blue light emitted from natural and artificial light sources. Although it is not shown as a definitive solution to eye problems, according to data, it is used against the effects of blue light and eye fatigue. Blue light glasses may be preferred in treating potential problems as they relate to eye health, sleep and cognitive abilities.
If you want to check if your glasses have blue light filtering lenses, look for flashing blue light sources, such as the lights on an ambulance. If you cannot see the blue light flashing, the blue light lens in the glasses is effective. In addition, the colors of blue light filtering lenses may vary. Glasses that filter blue light best are in shades of yellow or orange. If the lens color is closer to red, it can block almost the entire blue light spectrum, but the gradations in your vision may also change. Computer glasses with clear lenses may also be sufficient to prevent the effects of blue light. These glasses block approximately 20% of blue light. This rate may vary depending on the manufacturer. Blue-tinted glasses usually make the vision blue, so blue lights are not noticeable.
Blue light protection glasses usually block about 10-15% of blue light. This protection goes up to 40%. Even a small amount of filter changes the long-term blue light effect. It cannot be said that glasses with filters are suitable for everyone, but they are foreseen as a suitable option for possible eye problems.
Why Use Blue Light Glasses?
Blue light is known to disrupt the circadian rhythm and cause sleep problems. Therefore, if you are exposed to computer or phone screens for a long time and have sleep problems, glasses with blue light filters may be a good option.
As the time spent at home and in front of screens increases after events such as the pandemic, it is normal for blue light exposure and digital eye fatigue to increase. . Blue light is a factor in digital eye strain. Approximately 90% of those who use digital devices experience digital eye strain. The following symptoms are often seen in digital eye strain:
- Blurred vision
- Dryness and redness of the eye
- Difficulty focusing
- Headache
- Itchy and tight eyes
- Increased light sensitivity
Blue light all the time It is wrong to say that it alone creates problems, because excessive use of digital devices also brings problems.
What Are Blue Light Glasses Used For?
Blue light glasses filter the light absorbed by the eye thanks to specially made lenses. Although not much research has been done on blue light filter glasses, some studies suggest that they may have the effect of relieving eye fatigue by changing visual performance. Thanks to lenses that filter blue light, the eye focuses on low-energy light more easily and experiences less strain. Blue light filtering optimizes image contrast. Therefore, the eyes can better distinguish light and dark tones on screens and in social environments.
Blue light negatively affects the release of the melatonin hormone responsible for sleep. For this reason, it increases alertness. However, when blue light acts for a long time in the evening or at night, it changes the body rhythm. It affects the body's perception of day and night. With this, the sleep cycle is disrupted. Glasses with blue light protection can help relieve melatonin production from dysregulation, especially when using digital devices in the evening or at night. The sleep cycle is not disrupted.
How Do Blue Light Filter Glasses Function?
Blue light filter glasses are produced using special lenses that can block blue light that reaches the eyes directly. Usually these blue light lenses have a slightly yellow tint to balance the blue light. However, this situation is not noticed. The purpose of blue light filtering lenses is to filter blue light and minimize eye damage. Blue light glasses not only help improve eye health and focus, but also help reduce eye fatigue.
Blue light has the potential to affect eye health more than other types of light. However, this potential effect occurs in long-term use, not in short-term use. The structures in the front of the eye do not absorb all the light that reaches the eye. It absorbs UV light and prevents it from reaching the inside and back of the eye completely. In contrast, blue light easily reaches the back of the eye. For this reason, blue light filter glasses prevent the light from being completely absorbed by the eye. It is aimed to cumulatively prevent the harmful effects of blue light. If you have sleep problems and cannot live away from screens, you can choose blue light protective glasses.
Can Blue Light Glasses Be Used in Daily Life?
Blue light, which has many sources, reaches you in various ways in daily life.
- If you spend time in sunlight and do not use sunglasses,
- If you use digital devices for a long time for various reasons,
- If you are exposed to artificial light sources (fluorescent, LED light sources) that have a direct effect on the eyes for a long time in a home or work environment, it is recommended to wear blue light glasses.
Filtering protective glasses. Even though it has a feature, looking at artificial lighting such as light bulbs for a long time is negative for your eye health. Additionally, while you can easily use it on television, computer and phone screens, it may be more comfortable for you to watch it without glasses in the cinema. In addition to protective glasses, the most important criterion you should follow for your eye health is to keep your eyes away from screens.
Does Blue Light Tire the Eyes?
Blue light is one of the visible light beams. Naturally, the sun and all artificial light sources emit some blue light. Although blue light alone may seem harmful, the effects of blue light actually come from looking at screens for long periods of time. Blue light and eyestrain may not always be linked. Dryness or stinging in the eyes when you look at certain light sources for a long time cannot always be attributed to blue light. Eye fatigue affects the tear ducts and eye lubricity, tiring your eyes. There are not enough studies on whether blue light alone causes damage to the eyes. Most often, problems are not caused by blue light itself, but by excessive use of devices such as phones, tablets and televisions. Eye strain is not caused entirely by blue light, it is usually caused by digital eye strain. As a result, a disorder due to blue light only rarely occurs.
Blue light cannot always be said to be harmful and is necessary for health. Because blue light prevents the release of melatonin in the body and you stay awake during the daytime. A healthy amount of blue light keeps your circadian rhythm in check, maintaining your wakefulness and sleep cycle. What needs to be considered is the prolonged and excessive effect of blue light. In addition, blue light deprivation should be taken into consideration,
Tarih: 06/03/2023