Do sunglasses block blue light? Generally speaking, it is not possible to prevent blue light. The most significant role of sunglasses is to prevent the ultraviolet rays emitted by the sun. Anti-blue light glasses are best for indoor use, so most sunglasses do not have the anti-blue light function. You still need professional anti-blue light glasses if you want to block blue light.
The difference between sunglasses and anti-blue light glasses
Sunglasses block dazzling glare while protecting the eyes from UV rays. All thanks to metal powder filters that “select” light as it hits it. Colored glasses can selectively absorb some of the wavelengths that make up the sun’s rays because they use excellent metal powders (iron, copper, nickel, etc.). When light hits the lens, it is eliminated based on a process called “destructive interference.” When specific wavelengths of light (in this case, ultraviolet A, ultraviolet B, and sometimes infrared) pass through the lens, they cancel each other out on the inside of the lens, toward the eye. There is a complete guide to buying sunglasses.
Anti-blue light glasses are eyewear that prevents blue light from irritating the eyes. Special blue light blocking glasses can effectively isolate ultraviolet rays and radiation and filter blue light, suitable for use when watching a computer or TV. Anti-blue light glasses mainly reflect harmful blue light through the coating on the surface of the lens. Alternatively, add an anti-blue light factor through the lens base material to absorb harmful blue light, thereby realizing the blocking of harmful blue light and protecting the eyes. Blue light is an essential part of visible light. There is no separate white light in nature. Blue light is mixed with green and red light to present white light. Green and red light have less energy and are less irritating to the eyes. Blue light has a short wavelength and high energy, which can directly penetrate the lens and reach the macular area of the eye, causing macular degeneration.