Podcast Episode #218: Demystifying the 20-20 and 6-6 Vision Scales

In this episode, you’re going to learn what exactly “20-20” or “6-6” vision means and how this scale is determined, as well as how it was originally thought up. [TRANSCRIPT]

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One comment

  • Your podcast is wrong. In the US the big “E” at the top of the chart is a 20/400 size, not 20/200. Also 20/200 is only considered legally blind if that is your best corrected acuity. That means with your glasses or contacts on your best vision is 20/200 or worse.