What is retina design?

Related questions

1. How do you create a retina image?
2. Is the image formed on the retina real?
3. How does light focus on the retina?
4. Does IMG need a closing tag?
5. What tag does not require a closing tag?
6. What is the purpose of making a site retina ready?
7. What are iframes used for?
8. What is the function of retina?
9. Is the white of the eye?
10. Is IMG a block element?

Tags

1. #pixel
2. #resolution
3. #serving
4. #enough
5. #device
6. #screen
7. #experience
8. #result
9. #individual
10. #retina
11. #ready
12. #pixels
13. #human
14. #density
15. #quality
16. #display
17. #refers
18. #optimal
19. #images