Blue light is partially visible light that is part of the electromagnetic spectrum that our eyes can detect. It is produced from natural sources such as the sun and artificial sources such as electronic devices. So 25% of white light is blue. It is an essential and natural element of light with a wavelength of 380nm between 475 and 380num (i.e. the smallest part of the light spectrum). Today we can see everyone from kids to adults, ordinary men to celebrities everyone is addict to social media and other uses of smartphones. Everything can be accessed from a simple smartphone, from Rory John Gates Instagram account to the average person's Instagram account.
Visible light consists of rays of different colours, the most visible of which is blue. Each beam in the visible spectrum has a different wavelength, with infrared being the most prolonged and ultraviolet being the shortest. The colours we see are due to the reflection of different wavelengths from the surface and absorption by other wavelengths. If, for example, you see a red object, it is because the object's exterior reflects its wavelength red and absorbs different shades.
Rainbows are an excellent example of refracted light in the visible range. When light from the visible spectrum passes through a prism, it disintegrates, revealing the different light rays that makeup it. Most of the visible blue light passes through the lens and cornea and then reaches the retina. This light can alter your vision and prematurely age your eyes. Research has shown that excessive exposure to blue light can result in:
How Phone light can harm your kid's eye
Blue light generated by digital device screens can reduce contrast, leading to eye strain caused by digital devices. Dry eyes, fatigue, poor lighting, or the way you use your computer can also contribute to eye strain. Symptoms of eye strain include irritated or painful eyes and trouble concentrating.
The risk of getting an injury on the eye with blue light
Research suggests that long-term exposure to blue light can damage the retinal cell structures. This can lead to macular degeneration (AMD) as well as other eye problems. Visible light is absorbed by the lens and onto the retina, where the photoreceptors are converted into an electrical signal. The human body relies on an electrochemical process to create images and regulate the daily sleep-wake cycles. The light emitted by the sun, as well as by digital devices, contains significant amounts in the blue wavelength of light.
Ultraviolet (UV) light has higher energy levels than blue light. However, it is absorbed by the lens and the cornea, limiting the amount of light reaching the retina. Visible blue light can damage the retina as it can be absorbed by the pigment epithelium and specific photoreceptors, which, with temperature, can cause oxidation. Laboratory studies in rodents and a primate model have shown that prolonged exposure to bright blue light can increase epithelial pigment and photoreceptor mortality.
Today, children will never stop using technology. However, there are some simple things you can do to reduce your child's risk of developing eye and vision problems from prolonged use of computers and other digital devices. One of the most effective methods of minimizing the risk of eye strain due to digital technology is to follow the “20-20-20” rule: every 20 minutes, you should look away from the screen for a minimum of 20 seconds, look at something about 20 feet away from you. Blue light children's glasses experts advise you to protect your baby's eyes from blue sunlight and blue light from electronic devices. Glasses with built-in blue light filters, such as children's blue light glasses, are the best option for indoor use. Remember that different companies selling eyeglass lenses may judge blue light's filtering capabilities differently. Lenses with the best blue light filters will have a tint that affects their appearance. Additionally, certain anti-reflective coatings help filter out blue light.
