2007-11-24 21:00:45 · 17 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
Sphenodon has a well developed pineal gland, which is deemed third eye.
Limulus(King crab) is has a medial eye and two compound eye.
Spiders may also be thought of as having three eyes
2007-11-28 20:32:06 · answer #1 · answered by Ishan26 7 · 0⤊ 0⤋
I would say no such animals has 3 eyes.
It may come as a surprise , but not all animals have 2 eyes. True enough, most familiar animals are 'binocular'. But we don't have to go very far to find out that 2 does not always rule. Vertebrate animals have 2 eyes, but this was not always the case.
Our ealiest fish-like ancestors, evolved with a 3rd hole in their skulls and an eye that connected directly to the brain called the pineal eye. It appears that this adaptation become converted over time to a small organ associated with the control of hormone production - the pinal body or gland.
But tadpoles, other amphibians, and some of the lizards, among them the Tuatara, a living relic lizard of the Sphenodont group, a 3rd centrally located eye has remained although the function is not fully understood.
It is sensitive to changes in light and dark, but it does not form images, having only a rudimentary retina and lens.
It is visible as an opalescent gray spot on the top of the animal's head.
Some snakes have an 'extra' pair of eyes located on the forehead that can detect infrared radiation. They can see the heat of a mouse from a meter away, even in conditions where our eyes would see only pitch dark.
2007-11-25 07:33:23 · answer #2 · answered by Rosy-Rose 6 · 1⤊ 0⤋
YES! But the extra eye is not the same as the usual 2 eyes.
Generally ALL animals have binocular vision, which means that they see with two eyes. Surprisingly, NOT ALL animals have two eyes. Few animals got three eyes and some got multiple eyes.
>> Our earliest fish-like ancestors, evolved with a third hole in their skulls and an eye that connected directly to the brain called the pineal eye.
>> In tadpoles, other amphibians, and some of the lizards,(TUATARA for example), a third centrally located eye has remained although the function is not fully understood.
>> Some snakes have an "extra" pair of "eyes" located on the forehead that can detect infrared radiation. They can "see" the heat of a mouse from a meter away.
There are other animals as well considered to have multiple eyes. Check out this link for more details:
http://ebiomedia.com/gall/eyes/many.html
2007-11-25 05:50:55 · answer #3 · answered by ♥ lani s 7 · 1⤊ 0⤋
Here is an example of a cat born as a set of conjoined twins, it was born with two heads (fused) and four eyes, but for some reason two of its eyes fused together creating a 3 eyed cat.
2007-11-25 05:12:20 · answer #4 · answered by ♥ Mama to Michael + bean ♥ 4 · 1⤊ 0⤋
very rarely animals are born with 3 eyes, 2 heads etc and it's an example of an incomplete separation of twins, (conjoined twins)
2007-11-25 05:04:27 · answer #5 · answered by emily_jane2379 5 · 1⤊ 0⤋
An Iguana. Technically it is not an "eye" but it is on the top of their heads and it senses when the lighting changes (Something flies overhead-shadow).
2007-11-27 23:37:10 · answer #6 · answered by Iamhere 4 · 0⤊ 0⤋
I amnot sure about animals but there is a fish that has four eyes; Anableps Anableps[Old four eyes]
2007-11-25 09:03:55 · answer #7 · answered by ? 7 · 1⤊ 0⤋
Tuataras - have three eyes and are the oldest known reptiles.
2007-11-25 05:04:02 · answer #8 · answered by Anonymous · 2⤊ 0⤋
different spiders and scorpions have various numbers of eyes, some might have three
2007-11-25 05:10:38 · answer #9 · answered by derbydolphin 7 · 1⤊ 0⤋
tuataras have three eyes and are the oldest known reptiles
2007-11-25 05:03:31 · answer #10 · answered by Sal*UK 7 · 0⤊ 0⤋