Blue Light

COVID-19: Protect Your Eyes From Too Much Screen Time

You and your children are likely spending more time on mobile devices and computer screens than ever before. Too much time spent staring at screens can cause computer vision syndrome, or digital eye strain, in certain people. While not serious, this condition can be very uncomfortable, potentially causing:

Headaches
Eyestrain
Blurred vision
Dry eyes
Insomnia
Tiredness

Below are some useful tips to help you and your children avoid computer vision syndrome:

Blink more!

Staring at a screen strains the eyes more than reading printed material because people tend to blink 30-50% less. This can also cause your eyes to dry out. Be mindful of blinking and make it a habit when focusing on a screen, as it will keep your eyes healthy and lubricated.

Follow the 20-20-20 Rule

Give your eyes a break every 20 minutes by looking at an object located 20 feet away for 20 seconds. Doing so will allow your eyes to relax and will give both you and your eyes some rest.

Keep your distance

Your eyes work harder to see close up than at a distance. Try keeping your monitor or screen at arm’s length, or about 25 inches away.

Lighting matters

Make sure that your surrounding light is similar in strength to the light emanating from your screen. Contrasting levels of light, such as looking at a bright screen in a dark room, can strain the eyes.

Take breaks from the screen

You may want to stipulate ‘screen free’ time for yourself and/or your children, such as during meal times or for several hours throughout the day. Engage in hobbies that don’t require a screen, such as drawing, reading books, doing puzzles, playing an instrument or cooking (among many others).

Don’t use devices before bed

Studies show that blue light may affect your body’s circadian rhythm, also known as the natural wake and sleep cycle. Stop using screens one to two hours before bedtime or use nighttime settings to minimize blue light exposure.

Although it may require a bit of planning to protect your family’s eyes during this stressful time, ultimately, it’s all about balance — and what works for you and your family may differ from others.

From all of us at Freelton Eye Care at Freelton, we wish you good health and please stay safe.

Freelton Eye Clinic – Prevent damage from Blue Light?

Freelton Eye Care Real Tips from Your Freelton, Ontario Eye Doctor

Summary:

Everywhere you look, there’s an article or blog telling you all about hazardous blue light. However, after years of experience as an optometrist in Freelton, I’d like to point out that blue light isn’t the root of all evil. Your computer, phone, tablet, and every digital screen you own pose additional dangers to your vision and your sleep – beyond the dangers of blue light.

Topics: Eye exam Freelton, Ontario, Eye care services Freelton, Ontario, Eye Doctor Freelton, Ontario, Dry eye treatment Freelton, Ontario

Is Blue Light the Big and Bad Enemy?

Blue light is a short, high-energy wavelength emitted in large amounts by all electronic devices. It can pass through the eye to the retina, and laboratory studies have shown how prolonged exposure to blue light damages the retinal cells in mice. That’s one fundamental reason behind the plentiful warnings to avoid blue light. However, the results of studies on real people (not rodents) didn’t attribute blue light with the same level of risk; other risk factors can be just as threatening to human vision.

Many eye diseases can be quickly and easily diagnosed during a Comprehensive eye exam, Pediatric eye exam and Contact lens eye exam. If you were diagnosed with an eye disease, such as Cataracts, Glaucoma, Macular degeneration, Diabetic retinopathy, or Dry eye, you may be overwhelmed by the diagnosis and confused about what happens next. Will you need medications or surgery – now or in the future? Is LASIK eye and vision surgery an option for you ? Our Freelton eye doctor is always ready to answer your questions about eye disease and Contact lenses.

Eyes Block Blue Light Naturally

Although it’s true that digital tech emits a huge quantity of blue light, you may not know that the sun also shines mainly with blue light. In fact, on a sunny day, the light coming at you is nearly 100,000 brighter than your computer screen. Yet, few scientific studies on humans have uncovered any connection between sunlight exposure and the development of a retinal disease, such as age-related macular degeneration.

Then how did the studies show that blue light damages mice eyes? Because mice and people don’t have the same eyes. Humans have built-in protective elements – macular pigments and the natural filter of our crystalline lens – that protect against blue light. These parts of your eyes absorb the blue light before it reaches the retina at the back of your eye.

Of course, that doesn’t mean sunglasses are unnecessary. By blocking all UVA and UVB rays from your eyes, sunglasses provide many more benefits than just blocking blue light. For example, research has shown that sunglasses slow down the development of other eye diseases, such as cataracts.

Digital Devices Are Still Dangerous

Even though blue light may not be the ultimate threat posed by electronic gadgets, that doesn’t mean blue light has zero negative effects on your eyes or that your digital screens are harmless. Blue light has a powerful, adverse effect on your sleep physiology. That’s because you have photosensitive retinal ganglion cells that convey the time of day to your brain, based on how light it is in the environment. These ganglion cells, which are hypersensitive to blue light, help to set your internal clock to keep you awake and alert during the day. Therefore, when you stare at a digital screen and its blue light, your ganglion cells tell your brain it’s still daylight – even at 2 am.

What if you put a blue-light blocking filter on your tablet whenever you use it in bed? Sorry, no dice. Your retinal cells are also sensitive to light waves other than blue, so filtering out blue light won’t improve your sleep. Really, you need to dim all the colors, all the different wavelengths of light.

How to Relieve Tired Eyes and Promote Sleep

When my Freelton eye clinic patients complain that their eyes are tired and they can’t sleep after looking at a screen from dawn through bedtime, I advise them to dim all screens starting from the evening hours. Bright light before bed (even from your phone screen) makes it harder to fall asleep. Even better, accept the challenge of making your bedroom a screen-free zone.

If you suffer from eye strain, it’s a good idea to call your Freelton eye doctor and schedule an eye exam. It’s possible that you need a new vision prescription for glasses or contact lenses.

Last, but not least, keep your eyes lubricated! One of the best ways to do that is to blink frequently enough. When you stare at a screen, you’re probably blinking at a slower rate than normal. Consequently, your tear film evaporates and doesn’t get replenished until you walk away from your computer and begin to blink regularly again. In addition to blinking, using preservative-free artificial tears eye drops before you sit down at the computer can help boost your natural tears and keep your eye surface better lubricated.

For more tips on how to keep screens from causing uncomfortable symptoms or damaging your sight, visit your friendly Freelton optometrist – I’m always happy to share helpful advice!

Freelton Eye Care, your Freelton eye doctor for eye exams and eye care

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