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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.
- Released: Jan 01, 1970
- Runtime: 00:26:14 minutes
- Genre:
- Stars:
- Network: YouTube
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Se-1 Ep-13. Why wildfire season never stops 2018-07-17
