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

Simon Whistler 1
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 »

  1. A. sugawara August 28, 2014 at 8:56 pm - Reply

    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.

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