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Fly eyes, SEM
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Fly eyes, SEM
Fly eyes. Coloured scanning electron micrograph (SEM) of the simple eyes (ocelli) of a hover fly (family Syrphidae). There are three, forming a triangle (upper centre) between the much larger compound eyes (partially seen at left and right). The ocelli cannot focus, but detect differences in light intensity. The compound eye consists of many visual units, known as ommatidia. Each ommatidium consists of an outer cuticle covering a lens. The image seen by insects with compound eyes is thought to be a mosaic image, poorly focused but good at detecting movements. Magnification: x85 at 6x7cm size
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Media ID 6461183
© SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY
Bristle Bristles Compound Eye Hair Hairs Hover Hover Fly Insecta Lens Lenses Ocelli Ommatidia Ommatidium Protection Protective Sense Sensory Sight Simple Triangle Trio Units Vision
EDITORS COMMENTS
This print showcases the intricate and mesmerizing world of a hover fly's eyes. The image, captured through a scanning electron microscope (SEM), reveals the fascinating structure of both the simple and compound eyes of this tiny insect. In the center, we see three ocelli forming a perfect triangle amidst the much larger compound eyes partially visible on either side. While these ocelli cannot focus like their compound counterparts, they play a crucial role in detecting variations in light intensity. On the other hand, the compound eye is composed of numerous visual units called ommatidia, each encompassing an outer cuticle and lens. The resulting image perceived by insects with compound eyes is believed to be mosaic-like—a patchwork that may lack sharpness but excels at capturing movement. This natural adaptation allows hover flies to navigate their surroundings effectively while providing them with essential protection against potential threats. Zoomed in at 85 times its original size for this print, every detail becomes strikingly apparent— from sensory hairs and bristles to individual lenses within each ommatidium. It serves as a testament to nature's remarkable intricacy and highlights how even seemingly small creatures possess extraordinary senses. This print not only captures the beauty of wildlife but also offers insights into zoology, vision mechanisms, and animal protection strategies. It invites us to marvel at nature's wonders while reminding us that there is always more than meets the eye when it comes to our fellow inhabitants on this planet.
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