Name: スマートフォンで目が悪くなる？| スマートフォンで目が悪くなる？ (Do Smartphones make our Eyes Worse? | #aumsum)
Uploaded: 2021-01-14T08:18:25.000Z
Duration: 4 min 21 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

A smartphone is the only one at which we stare
for prolonged periods and hold it too close to eyes.

Besides this, smartphone screens predominantly
emit blue light.

Now, our eyes are built to absorb the harmful
ultraviolet rays coming from sun.

Thus protecting the inner sensitive membrane
called retina.

But since they are not good at absorbing blue
light emitted by smartphones.

It hits the retina and produces toxic substances
which slowly begin to damage the retina.

Hence, long term exposure to blue light may
affect our vision.

However, to resolve this issue many manufacturers
have incorporated a new feature called 'Night light'.

Night light causes the screens to give off
warmer colors.

Thus reducing the negative effects of blue
light.

Ha, no one can change the one and only AumSum.

Bending and staring down at our phones for
several hours.

Increases the stress on our neck and spine,
leading to neck and back pain.

Experts refer to this condition as text neck.

And it can eventually lead to serious consequences.

Also, at night, when we stare at our smartphones.

The light emitted from their screens makes
our brain think that it is still daytime.

So, our brain does not produce the sleep hormone
melatonin.

And thus, disturbing our circadian rhythm
which regulates our everyday bodily functions.

This can lead to obesity, diabetes, cancer,
etc.

An interesting fact is that smartphone addiction.

Has given rise to a new phobia called Nomophobia,
short for no mobile phone phobia.

It is basically the fear or anxiety of being
without our phone.

It happens because of blood vessels in our
eyes and pupil.

Pupil is a small opening whose size is adjusted
by the circular muscle called iris.

In bright light, the iris contracts making
the pupil smaller.

Thus allowing less light to enter into our
eyes.

In dark, the iris relaxes making the pupil
larger.

Thus allowing more light to enter and also
exposing the blood vessels in our eyes.

Hence, when we take a photo in such a dark
environment.

The flash of light from the camera floods
into our eyes at once.

Some of this light gets reflected from the
blood vessels onto the camera.

Before our iris can contract, making our eyes
glow red in photos.

Chlorine is not the main reason for this.

Chlorine is added to water of swimming pools
because it is a disinfectant.

It helps kill germs, thus keeping water germ-free.

In fact, the main reason for our eyes to turn
red is the presence of our bodily fluids.

Urine and sweat contain nitrogenous compounds
like urea.

Urea reacts with chlorine present in water,
forming chloramines.

Now, if we regularly clean the swimming pools.

Then we can prevent the production of chloramines.

But if the pools are not cleaned, then the
chloramines formed can irritate our eyes.

In addition to this, chloramines can evaporate
from water.

Inhaling these chloramines for a long period
can result in coughing, asthma.