20 / 20 is the normal vision of human eye.
20 / 20 is the normal vision of human eye.
what is the normal vision of human eye?
20 / 20
Na
Na
apple fan website "cultofmac" stated that the resolution the human eye can discern at 12 inches is 900 ppi, concluding "apple's retina displays are only about 33% of the way there." on the topic of 20/20 vision, they said "most research suggests that normal vision is actually much better than 20/20. in fact, people with normal vision usually won't see their eyesight degrade to 20/20 until they are 60 or 70 years of age" (confirmed by vision testing experts precision vision). "cultofmac" also noted that people do not always view displays at a constant distance, and will sometimes move closer, at which point the display could no longer be classed as retina.
retina display