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It's because red is picked up only by the eye's color cones |
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| Posted by |
markpearl91tt on February 13, 2003 at 10:41 PM |
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This message has been viewed 44 times. |
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| In Reply To |
actually you are supposed to have red gauges... posted by Z PYRATE on February 13, 2003 at 09:51 PM |
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| Message |
while your color-insensative night vision is almost completely the product of the receptors in your rods. White light will "blind" the highly sensative rods upsetting your night vision, but the red is only picked up by the color cones and therefore doesn't have an effect on your overall night vision (rods).
This is also why it's very hard to discern colors in dark situations ... the rods are pretty much the only receptors being used, and since they only perceive black and white (absolute light intensity), you can't tell the difference between colors.
Another cool thing is to look up into the night sky and try to see stars head-on. Looking right at the star, it's kind of hard to see it, but if you look back and forth, you can pick up the star much better in your peripheral vision. This is because the color cones (which again discern color but require lots of light) are centrally located in the eye. So looking straight at the star, there isn't enough light to see it. But the color insensative rods (which are very sensative to absolute light intensity) can pick up the light of the star easily ... but they are located around the outside of the eye, so the peripheral vision picks up the star best.
Okay - sorry. I was in a neuroscience Ph.D. program a few months back and we had to study the eyes in painful detail ... just thought to share. :)
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