To have 20/20 vision
Meaning
To have 20/20 vision means to possess perfect or excellent eyesight, and by extension, a clear and accurate understanding of a situation.
Origin
The phrase "20/20 vision" has its roots in the medical world, specifically with the Dutch ophthalmologist Herman Snellen, who developed the Snellen eye chart in 1862. This chart became the standard for measuring visual acuity. The "20/20" notation is an American standard, meaning that a person can see at 20 feet what a person with normal vision should be able to see at 20 feet. This clear, quantifiable measure quickly entered the common lexicon to describe not just physical eyesight, but also a metaphorical perfect understanding or foresight, offering a precise way to express ultimate clarity.
Examples
- After his laser surgery, he finally had 20/20 vision and could see the world with newfound clarity.
- The CEO truly had 20/20 vision when he predicted the market shift years before anyone else.