Nokia T20 Manual page 36

Nokia T20 Panduan pengguna
Use the Low blue light mode
Blue light is a color in the visible light spectrum that can be seen by the human eye. Of all the
colors that the human eye perceives (violet, indigo, blue, green, yellow, orange, red), blue has
the shortest wavelength and thus produces a higher amount of energy. Since blue light passes
through your eye's cornea and lens before reaching the retina, it may cause itchy and red eyes,
headaches, blurred vision, and poor sleep, for example. To limit and reduce blue light, the
display industry has developed solutions such as the Low blue light mode. To switch on the
Low blue light mode on your tablet, tap Settings > Display > Night Light > Turn on . If you
need to look at your tablet's screen for a long time, take frequent breaks and relax your eyes
by looking at distant objects.
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