On 21 Apr 2003 18:53:50 -0400, Warp <war### [at] tagpovrayorg> wrote:


>  Do you know the reason why your pupils get larger and smaller depending
>on the amount of light?
>  When the pupils get smaller, less light gets through and thus you don't
>see dimmer light.
>  This is the reason stargazers (those using telescopes) never use white
>flaslights but red ones. It takes lots of time for the eyes to adapt to
>the darkness.
>  You may see *some* stars, the brightest ones, but only a minimal percent.
>
You forgot to mention that the dark adapted eye looses colour perception and
goes into greyscale mode. Though I am sure you know that. 

Regards
        Stephen

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