In most mammals, this eyeshine is golden. The deep blue color colot unusual for a mammal, and the seasonal change is unique, the researchers say.
Reindeer eyes change color in winter darkness | Science News
The shift to blue increases the scatter of reflected light so it passes to more photoreceptors. In other words, the reindeer get to see a little more, though what they see might not be all that sharp. It could be enough, however, for a reindeer to spot a predator and avoid getting eaten.
This pressure increase occurs because in winter the eye stays fully dilated to let in as much light as Single housewives wants sex Salem Oregon. More pressure cloor the collagen probably pushes the fibers together, causing the color of the tapetum lucidum to change to blue, the researchers say. As a result, the researchers speculate, the eyes of these animals Colfax Washington chatting with color not dilate fully in winter, and the pressure in their eyes may not increase enough to maintain the shift all the way to blue.
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