show/hide words to know
- Kaleidoscope: something seen with a large number of changing patterns or shapes. Term that comes from the kaleidoscope toy that uses prisms and color shapes to create colorful patterns.
- Misconception: something commonly accepted as fact, but is actually not correct.
Do insects really see hundreds of tiny identical images?
You’ve seen it in the movies, as insects fly through our homes they see hundreds of tiny screens, all showing the same picture. Why would an insect need to see one image multiplied by a hundred? As it turns out, insects DO NOT see a kaleidoscope of multiple images. Ants see only one picnic basket, bees see only one hive and mosquitoes see only one warm body. Insects do have multiple lenses that take in light from their surroundings. After this light is transformed into electrical energy, it all travels down to the same place to be processed, the insect brain. Here this visual information is combined and forms just one image that allows the insect to make decisions based on its surroundings.
What do insects see? How can we imagine what insects see? Well, let’s try with what’s in front of you right now, a computer screen. Computer screens are made up of tiny color squares called pixels. When you combine millions of these pixels, they form an image on your computer, perhaps a game or picture of your favorite pet. Adding more pixels for a given area improves the quality of the picture you see, it becomes more crisp and clear. Now try this exercise: stand an arms length away from your computer, looking out at your computer screen, imagine the screen as it is, only made up of pixels the size of a pea. Now, through the eyes of an insect, these words would blur together into one big, dark column onscreen, surrounded by white stripes. What would a car look like to passing insect?
Additional images from Wikimedia.