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What Does 20 30 Vision Mean?

Answer

20/30 vision means that you can see a sign at 20 feet what a normal person would have to see at 30 feet. It is considered mild vision loss, or near-normal vision. People with such vision are recommended to get corrective lenses to bring their vision to normal.
Q&A Related to "What Does 20 30 Vision Mean?"
20/30 vision is close to perfect vision. It means you can see at 30 feet what a person
http://www.chacha.com/question/what-does-20%26%234...
20/20 refers to visual clarity at a distance of twenty feet. If you have 20/20 vision, you can view an object at twenty feet away with the same clarity as a "normal" person
http://www.quora.com/What-is-20-20-vision
The two numbers are a ratio, known as the Snellen Ratio. The bottom number is the distance someone with normal vision can distinguish a reference. The top number is the distance the
http://wiki.answers.com/Q/What_is_30_30_vision
In order to calculate 20/20 vision, you must first realize that the first number is always 20. It refers to what you can see at 20 feet in relation to an average person with normal
http://www.ehow.com/how_5066819_understand-vision-...
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