Your PC is incomplete without a monitor. A computer monitor is required for all desktop PCs, to see the characters and images processed by the computer using the graphic card.

Computer monitors are designed according to the display standards laid down by the industry. Occasionally these are called heads, when referring to several monitors used to display data using only one computer. Generally, the cathode ray tubes used for display screens are rectangular in shape, but circular and square screens are also popular

Present-day computers use a cathode-ray tube to display characters. This tube is made of glass and connected to a flat screen on one end, tapering to a narrow end on the other. A single electron gun is connected to the narrow end of the tube for a single-color monitor whereas three electron guns are required for multicolor monitors. The monitor emits light when the electrons strike the screen.

Although computers have become an integral part of our lives, using these machines for a long period of time can cause visual problems and headaches. The glare on the computer screen can strain the user