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I live in Austin, TX where the eclipse on August 21, 2017 reached its maximum point with ~66% of the sun covered by the moon.

Why didn't it seem any darker than a normal time with 0% eclipse?

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    $\begingroup$ Should be merged with astronomy.stackexchange.com/questions/22230/… $\endgroup$
    – user21
    Aug 21, 2017 at 19:50
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    $\begingroup$ Your eyes are designed to let you see in varying levels of illumination. If the day is a bit duller your eyes adapt. $\endgroup$
    – adrianmcmenamin
    Aug 21, 2017 at 19:55
  • $\begingroup$ Human eye intensity response is not linear, it is more like logarithmic $\endgroup$
    – mmainville
    Aug 22, 2017 at 4:45

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