FRANK FOX / SCIENCE PHOTO LIBRARY FRANK FOX / SCIENCE PHOTO LIBRARY
Damselfly eye. Light micrograph showing one of the compound eyes of a damselfly (order Odonata). Each compound eye is made up of numerous simple eyes called ommatidia. Each ommatidium sends a signal to the fly's brain, which combines the thousands of images to form a mosaic view of the world. The image is not sharp but is excellent at detecting movement. Magnification: x69 when printed 10 centimetres wide.
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