Degaussing removes the magnetism and restores the colour. Distortion Image warping. The image may look barrel-shaped or like a pin cushion. This can be adjusted with the monitor controls. LCDs and plasma monitors are examples of flat-panel displays.
Viewable flicker causes eye-strain.
LCD Liquid crystal display. Cells of LCDs are lit up by backlight instead of electron-lit CRTs. This makes the panel smaller, lighter and saves energy. Without CRTs, there is no heat or electromagnetic emission and no static build-up. A visible pattern of distortions like ripples and waves in computer graphics.