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[[Resolution ]] is the number of pixels that can be displayed. Resolution is usually shown as width x height. For example, a resolution of 1920 x 1080 means that it has 1920 pixels as its width and 1080 pixels as its height. A 1080p HDTV has the resolution of 1920 x 1080.
Higher resolution means sharper, clearer and more detailed images. Low resolution can cause the pixels to become visible to the human eyes. This is especially evident in [[Virtual Reality]] [[HMD]]s because the user's eyes are positioned very close to the display. Low resolution and low [[PPI]], pixels per inch, can cause the user to feel pixelation and feel like he or she is looking through a screen door. For optimal immersion, pixels on the display have to be dense enough to be invisible to the human eyes when viewed from very close range.
