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What Does 20/20 Vision Mean?

Vision is basically determined by the 20/20 factor. In other words, you can see at 20 feet what others can see at 20 feet. 20/20 vision is considered to be the best corrected vision, and is the vision that most people get their vision corrected to. It means that your vision is at the best capability.Some people have 20/15 vision, which means they can see at 20 feet what is easily seen by others at 15 feet. 20/15 is better than 20/20 vision. Vision better than 20/15 is very rare to achieve, either naturally or with correction, as most eye doctors will correct up to 20/20 vision.To fly an airplane, one must have 20/20 vision, with or without correction (glasses, contacts, LASIK). To drive, a person only has to have 20/40 vision, with or without correction. This means, a person can see at 20 feet away what others can see at 40 feet. The vision of the individual is always the second part of the equation, and is compared to what is normal to be seen at 20 feet. (20/70 vision means at 20 feet you see what others can clearly see at 70 feet, etc).My vision without correction is 20/340. This means that without my glasses on, what I see at 20 feet a person with normal vision could see clearly 340 feet away. The higher the second number in the equation, the worse the vision of the individual, the lower the second number, the better. My vision with glasses is 20/40, legal to drive.So, 20/20 vision essentially means that what you see at 20 feet away is clear as a bell, and should be easily seen by others with 20/20 vision 20 feet away. The higher the 2nd number, the worse off your vision is, the lower, the better. It's simply the standard way to test vision, and has been this way in America since 1862.Source:http://www.glassescrafter.com/information/what-is-20-20-vision.htmlBy Abby Willow - I enjoy making life easier either via laughter, new ways of doing things, or sharing knowledge I just stumble into (and trust me, it s STUMBLING, y all...)  






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Eye Vision 20 20 News


Welder, 23, is left with a 3cm-long metallic wire hanging out of his eye after his tool 'BURST' (and his 20/20 vision remained unscathed)

A 23-year-old welder was left with a piece of metal hanging out of the corner of his eye after his tool burst. The unnamed man, from India, avoided going blind - because the 3cm-long metallic wire narrowly missed his eye and burrowed into the skin.

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