+Pixel density quantifies the number of individual [Pixel](/wiki/pixel) elements packed into a physical unit of space on a display. A higher density renders a sharper, more detailed image, making individual pixels less discernible to the eye. This metric is commonly expressed as [PPI](/wiki/ppi), or pixels per inch.
+## See also
+- [Resolution](/wiki/resolution)
+- [Display](/wiki/display)
+- [Retina Display](/wiki/retina_display)
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