20/10 Vision with Dr.Gulani’s Lasik: Channel 4 TV Webcast
In the rare instances where vision may test better than normal on a Snellen chartSnellen chartSnellen developed charts using symbols based in a 5×5 unit grid. The experimental charts developed in 1861 used abstract symbols. Snellen’s charts published in 1862 used alphanumeric capitals in the 5×5 grid.https://en.wikipedia.org › wiki › Snellen_chartSnellen chart – Wikipedia, a value of 20/10 vision means that you can see clearly from a distance of 20 feet, what a person with normal vision sees well at a distance of 10 feet.
San Diego woman Concetta Antico diagnosed with ‘super vision’