About digital eyestrain?
Over the last decade, we’ve seen an explosion in the use of smartphones, tablets, e-book readers and mobile devices. People on average use four separate handheld devices for work, education, socializing or leisure in a variety of postures (for example sitting, standing or lying), switching frequently from one to another. It’s created a new multi-screening behaviour.
Our eyes can get tired from the effort of using several screens over long periods of time. More than 6 in 10 adults spend five or more hours on digital devices each day*. Since digital media is composed of tiny pixels and can often produce a pixilated image, the eyes have to work double-time to process the image. All that extra effort can lead to digital eyestrain. Common symptoms include headaches, tired, burning or stinging eyes, neck or back pain and difficulty focusing after extended periods of time. Digital eyestrain is particularly linked to the mid to very close-range distances at which people view the screens of digital devices.
Increased use of these digital devices has also amplified our exposure to the blue light emitted by LED screens. Most of blue light emission is beneficial to human health, but part of this light spectrum can also be dangerous for eye health, posing a risk factor for the onset of age-related macular degeneration**.
http://www.essilor.com/en/Innovation/magazine/Pages/How-digital-devices-are-impacting-our-vision.aspx
