From experience we know that most people are using badly calibrated monitors.

This directly affects their Internet experience and, believe it or not, their vision.

Adjust your screen:



If you can see 9 gray stripes (from black to white) and the numbers 1 to 8 in each stripe, then you are ok. If not, set the luminosity of your screen to maximum, then play with the contrast up to the point where you can see all the stripes and numbers. If you are not able to arrive at the expected result, you really need a better monitor.