That big “E” at the top of your doctor’s eye chart tells you whether you need glasses - but it also tells you a lot about the physics happening inside your eyes. We put human visual acuity to the test - in our office, and across a city.
Like Verge Science on Facebook: http://bit.ly/2hoSukO
Follow Verge Science on Twitter: http://bit.ly/2Kr29B9
Read More: http://www.theverge.com
Community guidelines: http://bit.ly/2D0hlAv