Retina display is a trademark used by Apple for displays with pixel density so high, the eye would not be able to notice pixelation. The term is used for several models of the iPod touch, iPhone, iPad, and MacBook Pro.[1]

Model Pixels per inch Resolution
iPhone 4, iPhone 4S, and iPod touch (4th generation) 326 960×640
iPad (3rd generation) 264 2048×1536
2012 MacBook Pro 220 2880×1800

For the iPhone 4, the display technology used to achieve retina display was developed by LG Display. The name 'retina display' is based on the assertion that a display of approximately 300 ppi at a 10-inch (254 mm)[citation needed] distance from one's eye is the maximum amount of detail that the human retina can process. With the iPhone expected to be used at a distance of about 10 inches from the eyes, a higher resolution would allegedly have no effect on the image's apparent quality as the maximum potential of the human eye has already been met.


According to Raymond Soneira, president of DisplayMate Technologies, the resolution of the actual human retina is higher than claimed by Apple, working out to 477 pixels per inch at 12 inches (305 mm) from the eyes.[2] Phil Plait of Bad Astronomy wrote a response that agreed in a way with both Apple and Soneira, saying "if you have [better than 20/20] eyesight, then at one foot away the iPhone 4’s pixels are resolved. The picture will look pixellated. If you have average eyesight, the picture will look just fine."[3]

See also


This article uses material from the Wikipedia article Retina display, that was deleted or is being discussed for deletion, which is released under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
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