Blue light glasses protect your eyes from the blue-violet rays emitted by screens and LEDs, known to cause eye strain and alter your circadian rhythm.

Use one of these at-home tests to make sure your blue light glasses are functioning optimally and filtering blue light effectively. Remember, however, that these tests only give an estimate and not 100% accurate answers.

1. Look for a tint

Blue light blocking glasses can be found online for as little as $13 while some high-end businesses sell them between $100 - $180. But is there really any difference in quality between them, and do cheaper glasses actually work?

The easiest way to test blue-light blocking glasses is by holding them up to the sky during a sunny day and seeing if their white colour changes slightly; this indicates special pigments in their clear lenses which absorb blue-light passing through. Another easy test involves looking at an RGB color chart while wearing the glasses: If the "B" circle darkens while "G" lightens, that indicates they are blocking out blue light passing through. Furthermore, blocking green spectral band filtering out means these nighttime glasses also block out wavelength 500-600nm which could otherwise disrupt sleep melatonin production, so testing these properties is not foolproof but just gives a good starting point for testing purposes.

2. Look for a material

Blue light from the sun helps regulate your circadian rhythm, the natural process that tells you when to sleep and wake up. Unfortunately, however, blue light from screens and electronic devices can interrupt this cycle and lead to eye strain and insomnia; block blue light glasses may provide relief and ensure you a good night's rest.

Look for lenses made of durable plastic such as polycarbonate that have been treated to filter out an extensive spectrum of blue wavelengths. Glass lenses may also block blue light but tend to be less reliable.

To properly test your blue light-blocking glasses, make sure they block wavelengths between 400 and 500nm. If they do not do this effectively, return or purchase another pair as this wavelength could negatively impact melatonin production levels.

3. Look for a design

Blue light, produced naturally by the sun, promotes alertness and serves as a wakeup signal, but digital devices such as computers, phones, and televisions also emit this type of illumination. While a small amount is necessary, too much blue light may disrupt sleep-wake cycles causing eye strain or insomnia.

To combat these symptoms, many people turn to wearing red- or amber-tinted blue light glasses at night when using their screens. These glasses filter out blue and some green light so as to optimize melatonin production and ensure optimal restful sleep.

But not all blue light blocking glasses are created equally; in fact, many don't filter out all harmful wavelengths. To be certain of your purchase decision, you should always request a detailed lens testing report before buying a pair of blue light blocking glasses; this report should demonstrate which wavelengths have been blocked out and by how much.

4. Look for a price

Blue light blocking glasses may help with eye fatigue, headaches and neck-shoulder pain by filtering Blue Light and reducing glare. They are specially designed to filter Blue Light.

Blue light can be found naturally both outdoors and within us; however, artificial blue light emitted by digital screens has been proven to disrupt circadian rhythms and cause eyestrain. Furthermore, some have hypothesized that artificial blue light could disrupt sleep cycles and contribute to diseases like dry eye. 

When shopping for blue light glasses, make sure they filter between 400-550nm wavelength range - this range blocks most of the blue light emitted by digital screens, helping improve sleep quality by increasing melatonin production in your body and leading to restful slumber. A great pair should also offer UV protection so as to shield eyes from sunlight rays. If you visit this website, you can get more and more blue light glasses on the internet platform.