Currently Apple is manufacturing its products with retina display feature. In Retina display the pixel density will be high that the unnoticeable pixelation with the human eye will be clearly seen. Many apple products were manufactured with this feature, products like MacBook Pro, iPhone, iPad, iTouch, etc,.Retina quality can be defined as pixel per inch. Apple has registered the name retina as its trademark in computer and mobile device field. Apple fourth generation devices like iPhone 4, iPhone 4S and iPad with resolution 960X640 has 326 pixels per inch, third generation device like iPad with resolution 2048X1536 has 264pixels per inch and MacBook Pro with resolution 2880X1800 has 220pixel per inch.
Retina Display Feature In Iphone
Retina Display Feature Review In Iphone