La retina display gets its name from parallelism what did i do Steve Jobs between Screen resolution that Apple installs on your devices and retina of the human eye. Jobs argued that the human eye could no longer distinguish a pixel on the Retina display thanks to exaggerated pixel condensation of 264 ppi. In this article we value such a claim by Steve Jobs and put it in perspective with the market.
Actually, the displays based on IPS panels that Samsung, in the case of the iPad, and LG, in the case of the iPhone, manufacture for Apple have a lower resolution than that of the retina of the human eye, more or less reach about 457 ppi, according to Raymond Soneria, president of Display Mate Technologies. Dr. Pablo Artal, physicist and optician, has spoken about this in several articles and indicates that the human retina is much superior to Retina.
On the Retina screen, each pixel of the 3 million that the panel has occupies 96 micrometers. The human eye contains 120 million rods for night vision and 7 million cones for day vision and color enjoyment. Taking this last reference we deduce that each cone occupies approximately some 2,5 micrometers. In this way, we see that Retina pixels occupy 40 times more than the cones of the human eye. Therefore, we can say that the human eye is far superior to Retina in this sense. It has much higher resolution and what is more, the screen Retina only shows a tiny part of the colors that the real eye can see.
Another thing is if we measure how much we actually see taking into account the distance at which we put the iPad. The usual viewing distance for an iPad is 33 centimeters. On the New iPad with its impressive resolution, each pixel occupies an angle of 1 arc minute. The vision of a young person with good eyesight is exactly 1 minute. Because, a young person could distinguish a pixel at that distance or less, but an adult person could not and less if the distance increases. It would not be the same case with the iPad that doubles the angle that a pixel occupies reaching 2 minutes, which would make it distinguishable for anyone.
In this test the New iPad and its Retina display do come out victorious since they match the human eye, and Steve Jobs would be right, as long as we followed the standard usage guidelines of the New iPad.
Sources. Alt1040.com / Wikipedia