A common saying is that looking at screens for long periods of time is damaging to your eyesight. This is a myth and no permanent damage will occur from looking at a computer screen for too long. However, your eyes may become fatigued from staring at your screen, commonly referred to as "eye strain". 

How to Protect Your Eyes From Computer Screens?

Some experts recommend using the "20/20/20" rule to prevent this which means taking a break every 20 minutes to look at an object 20 feet away for 20 seconds. Alternatively, try adjusting the brightness, contrast, and text size settings on your device for better visibility.