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eye structure of a tarsier?

is there anywhere online, about the eye structure of a tarsier?

like an eye model, or a diagram, or something..

or even little bits of information?

HELP PLEASE! i need it for a report.

here's a picture of a tarsier...

5 Answers

  • krizz
    Lv 4
    1 decade ago
    Favorite Answer

    In comparison with his body size, the eyes of the tarsier are enormous. In volume, the capacity of the bony eye orbits, or eye sockets, is larger than that of the brain case, and also larger than its stomach. Their eye sockets have post-orbital closure rather than the postorbital bar of the prosimians. This feature keeps the eyeballs from being pressed against by the powerful temporal muscles to their sides.

    Unlike most other nocturnal creatures, however, tarsiers do not have a reflective layer behind the eyes (tapetum).

    Pic of Tarsier skull:

    Scroll down a bit to see the orbit :

    Hope this helps.

  • 5 years ago

    Postorbital Bar

  • Anonymous
    4 years ago

    Tarsier Skull

  • The tarsier (TAR-see-ur) is unusually small. A full-grown adult will fit in a human hand. But this furry animal's real claim to fame are the huge eyes housed inside its tiny head. The tarsier's eyes are so big and heavy, they can't move in their sockets. To see what's happening around them, tarsiers must swivel their necks. The animal's large eyes may seem like a problem, but they're really not. In fact, they help the tarsier see well--especially at night. How? Like many animals, tarsiers have openings inside their eyes called pupils. The pupils allow light to travel into the eye. But a tarsier's pupils are extra large, allowing more light than average to pass through. The extra light allows the tarsier to see and catch tasty meals like mice in pitch darkness.

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  • 1 decade ago


    All tarsier species are nocturnalNocturnal animal

    A nocturnal animal is one that sleeps during the day and is active at night - the opposite of the typical human schedule ....

    in their habits, but like many nocturnal organisms some individuals may show more or less activity during the daytime. Unlike many nocturnal animals, however, tarsiers lack a light-reflecting area of the eye. They also have a foveaFovea

    The fovea, a part of the eye, is a spot located in the center of the macula region of the retina....

    , atypical for nocturnal animals.

    The Tarsier brain is different from other primates in terms of the arrangement of the connections between the two eyes and the lateral geniculate nucleusLateral geniculate nucleus

    The lateral geniculate nucleus of the thalamus is a part of the brain, which is the primary processor of visual information,...

    , which is the main region of the thalamusThalamus

    The thalamus is the main part of the diencephalon, a portion of the brain....

    that receives visual information. The sequence of cellular layers receiving information from the ipsilateral (same side of the head) and contralateral (opposite side of the head) eyes in the lateral geniculate nucleus distinguishes tarsiers from lemurs, lorises, and monkeys, which are all similar in this respect . Some neuroscientists suggested that "this apparent difference distinguishes tarsiers from all other primates, reinforcing the view that they arose in an early, independent line of primate evolution" .

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