What is the term

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5
Hello

Does anybody know what is the term for a really good eyesight?
20X20 or 6X6 or maybe something else?
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  • It is called 20/20 vision, metric would be 6/6 vision but most people do not use the second version in day to day conversions, so stick to the first one.
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      It varies from country to country.

      "20/20" means that you can read at a distance of 20 feet what a person with perfect eyesight can read at a distance of 20 feet.

      "6/6" means that you can read at a distance of 6 metres what a person with perfect eyesight can read at a distance of 6 metres.

      6 metres is just a few inches under 20 feet, of course, so they're direct equivalents. It just depends whether or not you're using metric measurements. Many/most countries that formerly used "20 feet" have now switched to "6 meters". So "20/20" is pretty old-fashioned, these days. Personally, I'd stick to the second one.
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  • Would that be laser focused, autopilot ninja eyesight?
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