Why bias lighting works
Backlighting of a television or monitor is called bias lighting. It works by giving your eyes a more neutral reference point for colors and contrast in a dark room. ... This forces your eyes to work harder and fatigue more quickly than they normally would.
Is backlight good for eyes?
If you prefer to watch TV in the dark, use an ambient backlight behind your television. This helps prevent eye strain.
Why do we need backlight?
Backlight photography emphasizes the depth behind the subject and gives images a greater sense of place. Dramatic effect. Backlighting can produce a dramatic contrast between the subject and the background. This can be an especially effective technique when shooting outdoor portraits.
