You can greatly reduce the eye strain by reducing the contrast or the relative brightness of objects next to each other.

You need to reduce the contrast of general viewing area, or background, when preserving adequate contrast at the desk or foreground.

Eye Strain and ComputingContrast allows you to visually find out an edge. So, it is essential in recognizing the shapes and reading.

Low contrast in the foreground makes you to suffer from eye strain when you are trying to focus hardly, such as reading under dull lighting conditions.

Also, high contrast in the foreground makes you to suffer from eye strain due to the glare and harshness.

Color has also lots to do with virtual brightness. Bright color looks bright and contrasting color looks high in contrast. Bright and contrasting colors cause more eye strain when compared to black and white.

Observing dark figures on the light background is easy when compared to light figures on dark background. It is easy to use dark gray and off-white backgrounds and it has enough contrast to identify the objects easily.

Setting the background same or slightly darker when compared to the foreground can strain your eyes. So, use a screen on the foreground to ensure the contrast suits properly for its use and proper lighting conditions.