Posts tagged ‘vision’
20-20 vision is based on the distance of 20 feet
When you do an eye test, the distance between you and the eye chart is 20 feet. The distance was chosen because […]
09/24/2010. Category: did you know. Tags: eyes, vision
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When you do an eye test, the distance between you and the eye chart is 20 feet. The distance was chosen because […]
09/24/2010. Category: did you know. Tags: eyes, vision
|