What does 20/20 vision mean?
What is 20/20 vision?
What does it mean to have 20/30 vision? What does a "20/17" vision mean? What does it mean to have 20/15 vision? What does a "20/13" vision mean? What does it mean to have 20/180 vision? Is 20/5 vision possible? Is 20/150 vision bad? Can you have 20/20 vision and still need glasses? What is a point and shoot camera under 20k? What does it mean to always see 20:20 on the clock? How should one obtain a perfect 6/6 vision? Vision (eyesight): How many frames per second do humans see? A normal human eye can see objects between 25cm and infinity. Can we see objects which are placed closer than the minimum distance using a lens? What does retina display look like? What does an "f/2.0 lens" mean? I'm having short sight with lens power -1.75 both eyes. How can I compare it with 6/6 vision? In Age of Ultron, who is Vision? What would an actual 30,000 foot view look like? If our eye was a camera, how would you describe it? What is computer vision? Why do I have double vision? How can I relate the focal length of the lens and the area it covers? What's the focal length of a human eye? How can you measure the negative focal length of a simple lens? What kind of eye shape do I have? What is retina display? What does the focal length (in mm) mean on a camera lens? What does -1.25 eye power mean? Which lens is good, 18-135 or 55-250? How do we determine if the images formed on the retina of the observer will be resolved?