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Fishes with chameleon`s eyes

Lizards-chameleons are famous not only ability quickly to change painting a body, but also the surprising eyes. Huge, hemispherical eyes of these kowtowing are protected by centuries with ring edge which can hide completely practically an eyeball, leaving only small aperture opposite to a pupil. And, when the chameleon translates a sight, this aperture moves synchronously with a pupil. Eyes of a chameleon are extraordinary mobile - they easily turn almost on 180 ° across and 90 ° on a vertical. Moreover, their movements are absolutely independent from each other - one eye the chameleon can look forward, another - sideways. Such device of eyes is necessary for this sluggish animals for hunting for fine mobile insects. Only extremely sharp sight and the wide review allow chameleons to find, and then an exact throw of long sticky language to suffice extraction.

At others kowtowing the similar visual device is not present, but recently was found out, that it possess small - about 2 cm in length - tropical fishes Limnichthyes fasciatus from family Creediidae.

Eyes Limnichthyes fasciatus have same as at chameleons, the form, are covered same ring figurative by a century and as can move in very wide range of corners independently from eacher. B othoth at chameleons, and at Limnichthyes fasciatus optical force of a crystalline lens is lowered, and corneas - is raised. Speed of accommodation of an eye - 720 dioptre /s at Limnichthyes fasciatus and 60 dioptre /s - at a chameleon is very high. Researchers have found out also a number of other optical features peculiar only to chameleons and Limnichthyes fasciatus - but neither in others kowtowing, nor at other fishes of similar eyes are not present.

However, at some kinds of fishes of an eye can move independently from each other. Such surprising convergence speaks, probably, some similar features of a way of life of these absolutely different animals. Both that, and another it is required to define a site of fine extraction and then to make as much as possible exact throw. So valuable and difficultly arranged tool, certainly, requires protection against casual damages, to it both at a chameleon, and at Limnichthyes fasciatus the eye is surrounded by a ring century.