It's rare these days to be out of reach of a screen.
Whether it's the phone in your pocket, the computer you use for work, or the very device you're reading this article on right now, we can't deny it: screens are a big part of our lives.
But what's the cost of worshiping our little glowing rectangles? Are there health risks involved and if so, what can we do to reduce them?
Aside from the many psychological and sociological questions our newfound dependence on technology poses, such frequent and close proximity to screens is bound to have a physical affect on our bodies.
As ergonomists, we're always talking about the postures these devices encourage our bodies into. We've written extensively on the risk of 'tech-neck' in the past (the classic head-hanging posture you see all over the train) - and we talk a lot about the dangers of being sedentary, but it's not only poor posture that causes a problem. What about the impact of screens on our eyesight?
Screens play such a major role in our lives. For many of us our devices are the last thing we see at night and the first thing we pick up in the morning. With such frequent use, it's imperative that we understand the risks.
What is blue light?
Many of our devices emit something known as blue light. Blue light is a specific part of the visible light spectrum. It comes naturally from the sun, and artificially from the screens we use such as mobile phones and computers. Those with a family history of macular degeneration are more vulnerable due to having larger pupils that allow blue light to penetrate directly into the eye.
All humans are born without any of the protective ocular lens pigment (OLP) present in the adult eye. OLP begins to form in the lens during the latter teenage years. At the same time, the amount of melanin gradually decreases. This is why children are more at risk from the dangers of blue light than adults. Over time our resistance to blue light decreases, which is why our eye sight often diminishes with age.
Conclusive evidence has show that night-time exposure to blue light can make it harder to fall asleep.
Effects of blue light:
How does Ocushield work?
This technology has been developed by eye care professionals alongside City University London.
- Cuts out blue light transmittance while still letting through non-harmful light.
- Does not alter colour of your screen.
- Reduces eye fatigue.
- Improves sleep after using devices at night.
- Protects screen from cracks and scratches.
- Comes in five sizes for laptops and desktop computers.