Everyone Loves their OD, Even Justin Timberlake!
I’m a fan of JT and it looks like his is a fan of his Eye Doctor! When I saw this I couldn’t resist writing a blog about 20/20 vision! Just what exactly does 20/20 vision mean?
Visual acuity is usually measured with a Snellen chart.
The expression “20/20″ is so common in the United States that there’s even a TV show named after it. But what does it really mean? Here’s where the 20/20 designation comes from.
By looking at lots of people, Optometrists have established what a “normal” or average human being should be able to see when standing 20 feet away from an eye chart. If you have 20/20 vision, it means that when you stand 20 feet away from the chart you can see what the “normal” human being can see. (In metric, the standard is 6 meters and it’s called 6/6 vision). In other words, your vision is “normal” — most people can see what you see at 20 feet.
If you have 20/40 vision, it means that when you stand 20 feet away from the chart you can see what an average human can see when standing 40 feet from the chart. To further clarify: if there is a person with “normal” vision standing 40 feet away from the chart and you are standing only 20 feet away from it, you both can see the same detail. 20/100 means that when you stand 20 feet from the chart you can see what a person with “normal” vision standing 100 feet away can see. 20/200 is the cutoff for legal blindness in the United States.
You can also have vision that is better than the norm, which is stated in the opposite ratio. A person with 20/10 vision can see at 20 feet what a person with “normal” vision can see at 10 feet.
Levels of Vision
20/20 – Normal vision. Fighter pilot minimum. Required to read the stock quotes in the newspaper, or numbers in the telephone book.
20/40 – Able to pass Driver’s License Test in all 50 States. Most printed material is at this level.
20/80 – Able to read alarm clock at 10 feet. News Headlines are this size.
20/200 – Legal blindness. Able to see STOP sign letters.
So all this leads me to ask…Is JT saying is new CD is a “Normal” or “Average” Experience???
Next Posting: What the heck is that thing in front of JT’s face and what does it do??