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Find all of our advice and guides to help you purchase or maintain your favorite pair of glasses.

Blue Light: Let’s learn to protect ourselves from it

1. WHAT IS BLUE LIGHT?

Blue Light is part of the light visible to our eyes: visible light ranges from 380nm to 780nm wavelength. Blue light corresponds to the range between 380 and 500 nanometers.
Blue light can be divided into two parts:

  • Blue-violet light (between 380nm and 455nm)
  • Blue-turquoise light (between 455 and 495nm), essential for regulating our sleep cycle. It even has the effect of improving our well-being and our good mood.
  • spectre de la lumiere visible

    2. WHY PROTECT YOURSELF FROM BLUE LIGHT?

    The energy of a photon is inversely proportional to its wavelength. Okay, but what does that mean?
    This means that the lower the wavelength of light, the more energetic it is, and therefore potentially dangerous.
    Blue light accelerates the aging of the retina and contributes to the risk of age-related macular degeneration (AMD), among other factors such as age or genetic and environmental factors.

    Exposure to blue light can also cause trouble falling asleep, migraines or visual fatigue at the end of the day.

    The sun and all artificial lamps and lighting are sources of blue light. The whiter (colder) the lighting, the more blue light it will be. Conversely, more yellow/orange (warm) lighting emits less blue light.
    Screens are, for example, white lighting, which is why it is necessary to protect yourself from them.

    3. HOW TO PROTECT YOURSELF FROM BLUE LIGHT?

    The simplest solution is to limit exposure to blue light, by reducing screen time for example.

    The French spend on average 6 hours a day in front of one or more screens (TV, computer, smartphone).

    For the rest of the time, it is possible to protect yourself from blue light by wearing glasses equipped with anti-blue light lenses. It is best to choose lenses that filter blue-violet light and let blue-turquoise light through. By filtering only part of the blue light (20 to 30%), this allows 3 things:

  • Do not impair color vision
  • Maintain the beneficial effects of blue-turquoise light
  • Also filter UV rays

  • Our non-prescription lenses or our anti-blue light prescription lenses filter out 30% of blue light.
    It is the perfect compromise between effective protection and wearing comfort without altering color perception.