Cognition diversity of the world contribute to the senses.Eyes provide us with ninety percent of all incoming information.The bodies of a man so closely associated with the brain, which are entrusted with the primary function of the nervous system communication with the outside world.The material for the light-sensitive layer of the eye is the brain nerve tissue.The bodies of a man using a peripheral portion of an image analyzer - photoreceptors.As a conductor visual analyzer uses the optic nerve.All this complex mechanism works in the central part of which was concentrated in the visual area in the occipital lobe of the cerebral cortex.
Talking about the bodies of view, we often represent those elements that are outside.First of all, a pair of eyeballs (eyes) and bodies performing auxiliary functions.These include the eyelids, eyebrows, eyelashes, lacrimal gland and ocular muscles.The eyelids are folds of skin, they limit the eye slit and close it if necessary.The inner surface of the mucous membrane of the century is that experts-ophthalmologists called conjunctivitis.The main function of the century is the lubrication of the tear fluid surface of the eye, as well as protection of the surface from drying and mechanical influences.Under normal conditions a person commits blinking once every five seconds.
pride of any beauty - eyelash - are at the edges of the eyelids, they are located in 2-3 rows, their number reaches eighty.They perform a protective function, warning against contact with the mucous membrane of the eyes of foreign particles.A huge role in the normal functioning of the eye plays a lacrimal gland.It is located outside the upper corner of the eye.She is constantly and continuously generates a special secret - slёzu.Daily volume up to 100 ml.Tear through the nasolacrimal duct is constantly drains into the nasal cavity.Chemically tear a 1.5 percent solution of common salt (NaCl), which includes a germicidal agent (lysozyme).Tear several functions.By washing the surface of the eyeball, its moisturizing and protecting against bacteria and foreign particles is added to the problem of substance withdrawal, the product of nervous tension and emotional stress.
of human organs are in constant motion.During the movement of the eyeballs meet the eye muscles.In the arsenal of the human eye, there are four lines and a pair of oblique muscles.Their installation ensures synchronous operation of the visual axis of each eye, so that they converge on the subject being treated.
Eyeball is a natural spherical lens with a diameter up to two and a half centimeters.Her three-shell limit.Called outer fibrous (tunica), the average was named vascular and internal names photosensitive (retina).
bodies of human nature is a complex mechanism that for the proper functioning requires careful treatment.Just as the human circulatory organs, the eyes do their job with the only difference being that they take a little rest in the sleeping man, but their operation is not terminated, but only becomes more "eco mode".
For normal operation, you must strictly adhere to the eye care visual work.This includes the separation of working time to load and short-breaks.A set of exercises that allow not only to train and tone the muscles of the eyes, but also stabilize the lens and for the nerve processes.
care about their own vision will ensure that you are a long time will be able to fully enjoy the variety of colors of the surrounding world.
