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Mantis Shrimp Eyes
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=xdeJBcGWTJs
Scaly-tailed Mantis • Lysiosquilla scabricauda • Mantis shrimps have the most complex eyes in the animal kingdom. • They have up to 16 photoreceptors and can see UV, visible and polarised light. In fact, they are the only animals known to detect circularly polarised light, which is when the wave component of light rotates in a circular motion. They also can perceive depth with one eye and move each eye independently. It’s impossible to imagine what mantis shrimp see, but incredible to think about. • Mantis shrimp have compound eyes that are made up of tens of thousands of ommatidia (elements containing a cluster of photoreceptor cells, support cells and pigment cells) much like flies. In the species with spectacular vision, Gonodactylids and Lysiosquillids, the middle of the eye has six rows of modified ommatidia called the mid-band. This is where the magic happens. • Each row is specialised to detect either certain wavelengths of light or polarised light. The first four rows detect human visible light and UV light. In fact, each row contains a different receptor in the UV, giving mantis shrimp extremely good UV vision.The ommatidia of the last two rows contain very precisely positioned, tiny hairs. This arrangement is most likely responsible for their polarisation vision.The overall structure of the eye is intriguing too. Three parts of each eye look at the same point in space. This results in about 70% of the eye focusing on a narrow strip in space, but also gives them the ability to perceive depth with just one eye. To create an image using this strip, mantis shrimp are constantly moving their eyes and scanning the environment. The ability to move each eye independently comes in useful here, and allows the mantis shrimp to have a large field of view. -https://theconversation.com/mantis-sh...
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