WebNov 21, 2024 · We have to determine 20/20 vision to be the average normal vision. However, as with most measurements in health care, there is a normal “range” of vision. Some of us … WebMar 21, 2014 · The line-to-line steps are irregular, ranging from 14% (20/70 to 20/80) to 100% (20/100 to 20/200 to 20/400) All line-to-line steps are equal 10√10, which is about a …
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Web20/20 vision is referred to as the standard, or how a “normal” person sees. This means, that when you stand 20 feet away from an eye chart, you see what the normal person should … WebAt least once between ages 20 and 29; At least twice between ages 30 and 39; Every 2 to 4 years from ages 40 to 54; Every 1 to 3 years from ages 55 to 64; Every 1 to 2 years after … songs high school musical
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