Some eyes have up to 28,000 such sensors arranged hexagonally, which can give a full 360° field of vision. Compound eyes are very sensitive to motion. Some arthropods, including many Strepsiptera, have compound eyes of only a few facets, each with a retina capable of creating an image. With each eye producing a different image, a fused, high-resolution image is produced in the brain. Possessing detailed hyperspectral colour vision, the Mantis shrimp has the worlds most complex colour vision system. Trilobites, now extinct, had unique compound eyes. Clear calcite crystals formed the lenses of their eyes. They differ in this from most other arthropods, which have soft eyes. The number of lenses in such an eye varied widely; some trilobites had only one while others had thousands of lenses per eye. In contrast to compound eyes, simple eyes have a single lens. Jumping spiders have one pair of large simple eyes with a narrow field of view, augmented by an array of smaller eyes for peripheral vision. Some insect larvae, like caterpillars, have a type of simple eye (stemmata) which usually provides only a rough image, but (as in sawfly larvae) can possess resolving powers of 4 degrees of arc, be polarization-sensitive, and capable of increasing its absolute sensitivity at night by a factor of 1,000 or more. Ocelli, some of the simplest eyes, are found in animals such as some of the snails. They have photosensitive cells but no lens or other means of projecting an image onto those cells.
Tobi may refer to:

Tobi (given name), a unisex name
Tobi (island), island in the Palauan state of Hatohobei
Tobian language, the language of Tobi
Hatohobei, an island and the southernmost of Palaus sixteen states
Tobi (month), in the Coptic calendar
Tobi!, a 2009 television series
Tobramycin, an antibiotic drug that is sold under the brand name "Tobi"
Tobi (Naruto), the alias of Obito Uchiha, one of the primary antagonists in the anime and manga series Naruto Shippuden
ToBI, a standard for transcribing English intonation
Tobi shokunin or tobi for short; construction workers in Japan
Tobi trousers, the typical piece of clothing of tobi shokunin
Texas Oilmans Bass Invitational (TOBI)
Tobi (1978 film)

See also
Tobias
Toby (disambiguation)