Digital Eyestrain

Digital Eyestrain

What is blue light?

Blue light is the high-energy light just beyond the potentially harmful ultraviolet light.
It is normally transmitted through the eye to the retina, because it is visible light that our eyes are designed to receive
UV light can be harmful to the eye and contribute to diseases such as cataracts, or growths on the front of the eye, and perhaps macular degeneration.

Digital devices such as TV screens, computer monitors, smart-phones and tablets emit significant levels of blue light. The higher levels of blue light place more strain on the eye’s focusing system than do printed materials.
Compact fluorescent light bulbs, high-intensity headlights and other LED lighting do emit higher blue light energy than more traditional light bulbs, causing excess exposure to blue light.

Is blue light harmful to the eyes?

Digital eyestrain leads to dry eyes and puts strain on the muscles that help the eye focus. It can cause blurred vision and other symptoms such as burning, stinging eyes. When staring at a digital device, we tend to not blink as frequently, and this causes evaporation of the tear film that protects the ocular surface and the eyes begin to dry. When viewing digital devices it is therefore much harder to maintain a sharp or consistent focus on an electronic image compared to a hard image.

Benefits of blue light
Blue light triggers the suppression of melatonin in the brain, keeping us awake. This tells us when we are tired or should be awake. We are not designed to be using our phones and tablets 6 inches from our faces, particularly when we are lying in bed with the TV on.

Top Tips:

  • There are numerous Blue-Control Lenses now available to selectively block out the high-energy blue light that contributes to the fatigue and strain placed on the eye’s focusing system. For people who spend significant hours on a computer or other digital device, these lenses provide some relief and comfort. Ask your Optician for details.
  • It is important to use the 20/20/20 rule. For every 20 minutes of digital device use, look away for 20 seconds focusing on something 20 feet away.
  • Using artificial tears or lubricant drops may also relieve some symptoms of dryness.
  • Ideally turn off your devices one to two hours before going to bed to trigger the release of melatonin, giving it a chance to increase just before dozing off into deep sleep.
  • Sweeneys Opticians are offering 35% off BLUE CONTROL LENSES for the month of May.
    You are also entitled to a FREE eye examination every two years or every year if you have a change in your vision under the medical card scheme and employers PRSI scheme.Why would you not avail of this service?
    Call us on  on 071-9169090 to arrange an appointment.