dark adaptation at 7° in the periphery

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NewAmerica

Banned
Mandarin
Does "dark adaptation at 7° in the periphery" refer to "dark adaptation at 7° in the periphery (of the view (visual area of the eye)"?

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Counting every quantum

1. Human subjects were asked to rate both blanks and very dim flashes of light under conditions of complete dark adaptation at 7° in the periphery. The ratings used were 0, 1, 2, 3, 4, 5, and 6.


-The Journal of Physiology

Source
 
  • PaulQ

    Senior Member
    UK
    English - England
    "rate both blanks and very dim flashes of light under conditions of complete 'dark adaptation'; the blanks and very dim flashes of light were at an angle of 7° measured from the extreme edge of their vision."
     

    Packard

    Senior Member
    USA, English
    Dark adaption means that the iris has opened to the maximum to allow as much light in as possible.

    This is a chart of vision angles:



    And I found this one which matches up with what Paul says. I don't know which is being referenced:

     
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