If you've ever worried about the effects of a digital screen on your eyes, you've probably heard of "blue light," and maybe even looked for ways to protect your eyes from it. Blue light glasses (or blue light blocking glasses) are more popular than ever because they claim to protect your eyes from potential damage, but how effective are they at keeping your eyes healthy? Here, we take a closer look at the science behind blue light glasses, and whether they actually work.

What is Blu-ray?

Sunlight contains many colors of light (including red, orange, yellow, green, blue, indigo, and violet), each with a different wavelength and energy level. Combined, this spectrum of colored light produces what we call "white light" (or sunlight).

Blue light is just one color in that spectrum—often defined as "visible light." This means it has a short wavelength and a high energy level. Various sources of light emit varying degrees of blue light, the biggest of which is the sun, which is where we are exposed to the most blue light. However, there are also many artificial light sources, and in recent years, blue light has gained notoriety for its association with digital screens. Computers, tablets, smartphones and other digital screens emit blue light. While this is a fraction of what the sun emits, the amount of time people use these devices and the distance these screens are from their eyes raises concerns about the potential long-term effects of blue light on eye health.

How does blue light affect your eyes?

Blue light has very short wavelengths and easily penetrates the eyes. This means that almost all visible blue light can pass through the cornea and lens to the retina (the inner wall at the back of the eye). While little research supports this, some experts believe that too much exposure to blue light may damage the light-sensitive cells in the retina. An animal study also found that blue light damage may cause phototoxic retinal damage.

However, while digital screens do emit some blue light, the study found that blue light exposure levels from screens were significantly lower than those from natural daylight, and neither level reached the eye-safe limit. This means that potential blue light damage from digital screens is likely to be minimal, if any.

What are anti-blue light glasses?

Blue light glasses (sometimes called blue light blocking glasses) are glasses that contain lenses that are specially designed to reduce the amount of blue light reaching the eyes. These lenses filter blue light, helping to prevent them from entering your eyes and causing potential damage. Typically, blue light lenses have a slight yellow tint (to counteract the blue light), but you usually won't notice this.

Water, smudge and static resistance also means your lenses stay cleaner longer from dust and are easier to clean.
Of course, in order to better protect your eyes in front of the computer, we need to eat more vegetables while preventing blue light, and supplement lutein, multivitamins and zeaxanthin to strengthen the antioxidant capacity of the eyes, thereby protecting us. s eyes.