We’re All Color Blind

Written by Science Knowledge on 1:13 AM

Black-and-white vision is a one-dimensional affair. A given shade can get blacker or whiter, but that’s it. Color vision (by which we mean human color vision) has three variables. You can modify any color by changing the amount of red, green, or blue in it. This mix of colors triggers different cones in your eye, creating the perceptual experience of seeing a single, specific shade.

But some animals aren’t limited to three types of cones. Consider birds, whose eyes have a number of advantages over yours. Their eyes are stacked with more cone, and these cones are arranged in larger patches (or in multiple patches) and packed more closely together. This arrangement gives some birds spectacularly sharp vision over long distances. But the most remarkable feature of birds’ eyes is how their cones work. Unlike your eyes, which have three types of cones, birds’ eyes have four or five distinct types of cones.

So what does this mean? Imagine meeting a pigeon and traveling with it to the countryside. Your eyes will collect the same reflected light as the pigeon’s eyes. You’ll see the same scenery. But the pigeon will perceive that light differently. Its eyes will break the rolling hills into a mix of four primary colors, while you translate them to a measly combination of three. For the pigeon, the contrast of certain wavelengths of light will become more dramatic, allowing it to spot details that your eyes miss. The difference is a little like leaping from black-and-white to color vision. Ultimately—and there’s no way around this—the pigeon will get a subtler, more nuanced view of the outside world.

So the next time an interior decorator scolds you for mistaking pistachio green for chartreuse, remind yourself that in the eyes of a pigeon, we’re all color-blind.

Source of Information : Oreilly - Your Body Missing Manual

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In its broadest sense, science (from the Latin scientia, meaning "knowledge") refers to any systematic knowledge or practice. In its more usual restricted sense, science refers to a system of acquiring knowledge based on scientific method, as well as to the organized body of knowledge gained through such research.

Fields of science are commonly classified along two major lines: natural sciences, which study natural phenomena (including biological life), and social sciences, which study human behavior and societies. These groupings are empirical sciences, which means the knowledge must be based on observable phenomena and capable of being experimented for its validity by other researchers working under the same conditions.


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