This is Protecting your eyes while using your mobile phone

Most of us have sensitive eyes when they are hit by a strong source of lights.
You may feel a little ache and sometimes the head starts to ache too.
To prevent this instance happens while you are using your phone, you should adjust
its brightness level depending on the lightning you have on your surroundings.

In daylight, setting the brightness level of your phone screen to the lowest level will
give you a blind visions on your phone. At this time, the brightness level of the screen
must be 80-100%.

In mid-light surrounding like you are inside a house where there is a little light coming from the outside, you can set the brightness level to 30-50%.

At night or where the place where there is no source of light but your phone, make sure to set the brightness level at its minimum or 0%. For me, zero percent of brightness setting on my phone during this time still brights for me. If only I could adjust it to -10% I will do so but this feature is not available on my phone.

To easily adjust the brightness level of your phone screen, you can create a shortcut of it on your home screen. If you are using an android phone, from the start screen

• Tap the menu key
• Add
• Shortcuts
• Scroll down until you see the Settings
• Then choose the Display settings

The shortcut will then goes to your home screen.
And there is no more reason not to adjust the brightness level from time to time as it needed.