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Save your Vision from Harmful Blue light


An eye
An eye

Welcome to Youth Motivator. I would like to tell about how to protect your vision from your smartphones, tablets, computers and televisions.

We extensively use our phones and computers all day, be it in our home, office or during travel and even before going to sleep, so it is very important to understand this topic.

Proven by research-

A research study published in the year 2018, found that blue light emitted by our smartphones, tablets, televisions and computers might hurt our vision and may also induce blindness.
The blue light emitted from these devices have potential to alter the cells in our eyes which hastens the process of blindness.

What is blue light?

Blue light is one of the components of white light or visible light, along with other components like red, orange, yellow, green, violet and indigo lights.

The blue light is emitted not only from our devices but also from sun.

The most dangerous light-

Of the different lights in the visible light spectrum, the blue light possess highest intensity and energy. As blue light has higher intensity and energy, it penetrates deep into the eyeball damaging the retina, unlike other lights which get absorbed in the cornea, without producing any harmful effects.

You don’t have another choice-

Even though if you do not want to look at the screens, you will be forced to look at them at your workplace, as many companies now use computers and everything is getting digitalised.

Another research from the University of Toledo has confirmed that the blue light causes toxic reactions in our retinal cells.

Causing irreversible damage to our eyes-

In the studies, the researchers have found that blue light produces poisonous chemical reactions which kills the photo receptors located in our eyes, this in an irreversible process.

Once your photo receptor cells are dead, they can never be replaced with new photoreceptor cells. And is responsible for early occurrence of macular degeneration, which is not curable.

They have tested all the colours including green, yellow and red but the cell death only occurred on exposure to blue light.

Other adverse effects-


In addition to damaging our eyes, blue light also affects our sleep pattern (sleep cycle or circadian rhythm) by decreasing the secretion of melatonin, the sleep hormone.

Continuous exposure to blue light also causes insomnia, sore eyes, and headaches and affects your attention.

The damage inflicted is worse if you use your device in a dark room, as your eyes will experience strain to a greater extent. So, always use your devices in well-lit environment or rooms.

Disturbing our sleep-

Our bodies have an inbuilt natural clock which decides the time to be active and the time to go to sleep, that is our bodies maintain its own sleep-wake cycle called circadian rhythm.

If you are exposed to blue light then, your body senses that it is day time and tries to keep you awake and alert.

Mechanism-

So, in the morning, naturally you will be alert because of the blue light emitted by the sun and in the night time, when you use smart phones which emit blue light, it signals the brain that it is day time and your mind tries to keep you alert and awake.

As a result, you won’t be able to get sleep and the next day you will wake up feeling tired and restless. So, using these devices on bed disturbs your sleep cycle and suppresses the release of sleep hormone, melatonin.

During evening times, the atmosphere turns amber or orange-yellowish colour, it signals your brain that you should take rest or go to sleep.
When the disturbance to your sleep cycle continues for a long time, this results in the increased risk of cancer, depression, diabetes and obesity.

Better be safe than sorry-

Fortunately, there are many ways in which we can protect our eyes and health.
The manufacturers of smartphones, tablets and computers have provided us with an in-built option that filters blue light.

For mobiles and tablets-

This software in mobiles and tablets is often called as Night Light, Night shift mode, reading mode, Eye comfort mode, etc. All these modes shift the temperature of the screens from cooler to warmer.

Even if your device does not have an inbuilt app, you can easily download similar apps on the play store, like Twilight, blue light filter, etc.

For computers-

And in computers you can find this setting in display settings which says lower blue light and even if there is no inbuilt option, you can download f.lux application. It is a very light weight application.

If you use computers in your work place, then you would not have the permission to install new software. Then, the solution is to press the hardware buttons on your monitor and direct to display settings, screen temperature, here select warm or reading mode.

Some monitors even allow you to adjust the intensity of blue light; here decrease the blue light intensity up to 60 or 70 per cent.

Being cool makes you blind-

If the screen is cooler, it means blue light is getting emitted. And if the screen appears warmer, it means the blue light is getting filtered out, in this mode the screen attains a yellowish hue.

Believe me, in the beginning you might feel uncomfortable to look at the yellow tinted screen but within a week you probably would not notice any issue. The most important point to be noted is nothing is more important than our eyes and eyesight.

Make sure to maximise the night light to obtain complete protection from blue light.

Other useful tips-

You can even use special screen protectors to limit the blue light emission, like a blue light filter from a brand by name invisible shield. 
Even spectacles which filter out blue light are available.

It would be a best practice to not to use your mobile or computer at least one hour before going to sleep.
If you use your devices in dark environment, turning on dark mode helps your eyes immensely.

The upcoming version of Android, Android Q has a system wide support for dark theme. Some phone manufacturers like Samsung and Mi also provide dark mode or theme option.
Also many apps have dark mode or dark theme option and use a dark wall paper in your WhatsApp chats.

Dark mode in addition to helping our eyes also saves battery.

If you have a mobile with OLED screen, then the battery life will greatly increase on using dark mode because the black pixels do not need to turn on and even if your mobile has a typical  IPS LCD panel, there will definitely be a minimal increment in battery life. Even using a dark wall paper saves your battery.

Thank you very much for reading. Please visit my blog and share the content, follow this blog as I will be updating my blog on a very regular basis with interesting information. And also, subscribe to my blog.

Feedback from readers is highly appreciated; it helps me to deliver better results to you.

Once again thank you for your time.

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