Do Blue Light Blocking Glasses Work?


Blue light blocking glasses are designed to filter or block blue light from the screen of digital devices, and prevent eye fatigue and reduce the potential damage to the retina from prolonged exposure to blue light. With the increasing use of smartphones and computers, anti-blue ray glasses are becoming more and more popular every day, our various blue light blocking glasses for adults and kids are sellable in the global market.

What Is Blue Light?

The name of blue light comes from its color. It will appear even when people perceive the color of light as white. Their wavelengths are between 400 and 450 nanometers, and each photon carries more energy than photons of other colors.

Blue wavelengths are beneficial during the day because they can improve concentration, reaction time, and mood, but they are the most destructive at night

This type of light has always existed. It naturally exists in the sun, but technology makes our contact with it more frequent. Today, people spend at least a few hours a day in front of computers, TVs, tablets, and smartphones. These screens are made of light-emitting diodes (LEDs) that emit shorter blue light (and therefore brighter). Energy-saving bulbs made of LEDs are another increasingly common blue light source.

Blue light is ubiquitous in natural light and sunlight. Computer monitors, fluorescent lamps, mobile phones, other digital products, display screens, LED, and other light also have a large amount of distribution, but not all blue light can cause harm.

The harmful blue light is within 400 to 440 nanometers. Besides, the blue light between 480 to 500 nanometers is beneficial to the human body that has the effect of adjusting biological rhythms, sleep, mood, memory are relative to blue light.

Is shortwave blue light necessarily harmful to human eyes? It is also related to the irradiation intensity and the irradiation time. When it reaches a certain level, blue light will damage the eye health.

In sum, the key to reducing blue light is to limit the daily screen time. This is the easiest way to avoid large amounts of blue light and digital eye strain that can cause.

Effects on the Eye

Some light can cause lasting damage to the eyes. For example, ultraviolet light can cause diseases such as cataracts and increase the risk of eye cancer. However, the tiny amounts of blue light emitted on the screen of the device do not damage our eyes. This does not mean that the devices we use every day are entirely uninjurious. Here are 2 effects that affect the eyes.


The problem is not with Blu-ray itself, but the way is how people use these devices. Staring at the computer or mobile phone screen for a long time every day and placing it too close to the face often leads to computer vision syndrome.

People with eye fatigue may have various symptoms. The most common eye symptoms are divided into internal eye symptoms (strain and pain), external eye symptoms (dryness and redness), visual symptoms (blurred vision or flashing lights), and musculoskeletal symptoms (shoulder and neck pain)

Staring at the screen for a long time will cause dry eyes because the frequency of blinking is decreasing. It is usually temporary as long as you lessen digital screen time.

Sleep Disruption

Looking at your phone in bed may seem harmless, however, it will greatly influence your sleep quality. Blue light affects the circadian rhythm of the human body, allowing your body to know when to sleep and when to get up. Any kind of light, even shimmer, can inhibit the secretion of melatonin, which affects the circadian rhythm, therefore the blue light at night has a stronger effect

Lights at night are the cause of most people's lack of sleep at night. Lack of sleep increases the risk of depression, diabetes, and cardiovascular disease.

Practical tips

Most of us cannot leave computers and mobile phones for most of the day, but we can do small things to reduce the negative effects of blue light on our eye health and sleep:

1.Keep appropriate spacing from a computer or laptop:

One of the most common mistakes when using a computer is to sit too close to it. Ideally, you want your computer screen to be 25 inches away (or one arm away). At the same time, adjust the position of the screen so that your sight is slightly downward.

2.Build normal rest time:

plan out t a reasonable break schedule and stick to it, using the 20-20-20 rule: every 20 minutes, stare at objects 20 feet away for at least 20 seconds.

3.Use artificial tears:

when the eyes feel dry, use artificial tears to refresh the eyes.

4.Don't look at your phone before going to bed:

Don't waste too much time on your phone before going to bed. Besides, you need to reset the device to sleep pattern.

5.Use dim red lights at night:

red lights are unlikely to affect your circadian rhythm.

6.Expose yourself to a lot of bright light during the day:

this will improve your ability to sleep at night, as well as your mood and alertness during the day.

Problems caused by digital equipment can be easily prevented or controlled by simple methods, but persistent symptoms should not be ignored. People should ask an ophthalmologist to check their eyes regularly. This will help avoid future problems and detect potential diseases early.

As a professional blue light blocking eyeglasses manufacturer and exporter, we will choose the most suitable and fashionable anti-blue light glasses according to the customer's requirements, both optical frames, reading glasses, and sunglasses. If you wear the correct blue light blocking glasses at the right time, you will not harm your eyes, but protect your eyes from harmful blue light.