How Many Eyes Does A Fly Have
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Flies are known for their pesky behavior, especially around food. Apart from annoying people, they serve an essential role in the natural ecosystem. They feed on decomposing animal and plant material and are essential to the cycle of life. Of course, if you want to go deeper into ecology and biology, there are even more important details to consider. Let’s start by exploring the body of a fly and to answer the question: how many eyes does a fly have?
Flies have two compound eyes, with each eye having around 4,000 lenses. In addition to their two compound eyes, flies also have three simple eyes called ocelli. Ocelli are usually used to detect light and contrast changes, and help the fly orient itself in relation to the sky and horizon.
The compound eyes of the fly are made up of six separate parts: the retina, the retinal cone, the retina pigment epithelium, the crystalline cone, the pigment-cup, and the crystalline cone. Collectively, these structures are what make the compound eyes of the fly capable of seeing motion and color.
While flies have extraordinary sight compared to humans, they still struggle to see up close. The minimum distance they can see clearly is around 45 cm, but this is enough for them to identify food or sense threats.
Overall, a fly has two compound eyes and three ocelli, which gives them excellent sight capabilities and makes them difficult to swat away. With 6 eyes, you can safely say a fly has one of the best eyesight among insects.