The display has a resolution of 1, 440 pixels wide by 900 pixels high and an aspect ratio of 16:10.

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At 220 pixels-per-inch, the Retina display's pixel density is so high the human eye cannot distinguish individual pixels from a normal viewing distance, so text and graphics look incredibly sharp.

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The new Ultra HD 4K screens have four times the number of pixels as standard High Definition TVs.

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