Octopuses are the most ancient inhabitants of depths which as it is considered, have outstanding mental capacities and the amazing structure of a body. Eyes of an octopus have the building, unusual to sea inhabitants, and light sensitivity that allows a mollusk to be the most big-eyed inhabitant of the ocean.
Octopuses are intellectuals of sea depths
Octopuses are surprising beings who are a riddle for scientists also now. These beings steadily draw attention of scientists-oceanologists with the amazing structure of a body and unusual mental capacities, It is considered that octopuses, on an equal basis with cuttlefishes and dolphins, are the cleverest representatives of marine fauna. However these beings are remarkable not only the mental capacities.
By scientists it is noticed long ago that octopuses are owners of eyes, unique not only the building, but also the sizes bodies and visual opportunities are rather long. The big brain and huge eyes allow an octopus to receive much more information on the world around, than any other animal on the planet. Eyes of an octopus still are a subject of disputes in the scientific environment and not all details of an image of the world these animals are clear and studied by the person, but nevertheless some stunning these scientists already have.
Unique opportunities of eyes of an octopus
First of all, It is necessary to tell that eyes at octopuses very big and make about 10% of the lump of a body of an animal. In respect of the size of eyes concerning body weight the octopuses are the real champions in fauna. For example, at an adult huge octopus the size of an eyeball is 35-40 cm. The anatomic structure of an eye of an octopus is very similar to the structure of an eye of the person. Eyes of an octopus consist of a retina, an iris, a crystalline lens and a cornea. The pupil is mobile and can extend and be narrowed, but the octopus not at the expense of a crystalline lens curvature, and due to its approach and a distance in relation to a retina focuses a look. It is considered that these mollusks are capable to focus a look on the objects interesting them that other sea inhabitants are not capable to do. The sensitive retina and a crystalline lens of an eye of an octopus perfectly distinguishes colors, and even in muddy water. The big size of eyes of an octopus also helps it to survive with the ocean as thanks to such structure of an organ of vision this mollusk is capable to see objects even in outer darkness. The unique structure of eyes of an octopus allows it to perceive the volume picture therefore these animals perfectly distinguish a form of objects. Some fans of these cephalopod mollusks believe that visual bodies of an octopus allow it to see even in an ultra-violet light spectrum, but these data did not find scientific confirmation yet.