wonder how I see the world?This question at least once in the life of each person asked himself.Now we will respond to it in detail.So, seeing how they see the world ...
Eye is in the orbital cavity of the skull, where it is attached with muscles.This delicate and sensitive organ of vision is in need of protection, which took care of the nature.So, eyebrow hair to protect it from sweat and other fluids that drain from his brow and lashes - from dust particles in the air.
lacrimal gland secretes a fluid that helps evenly spreading the eyelids during blinking.This is to ensure that the external mucosa does not dry.Besides tear washes away foreign particles caught in the eye, and runs with them for tear ducts into the nasal cavity.
As seers see the world?
Eye has three membranes - outer, middle and inner.The outer shell of the protective role, dense sclera, the front moves into the transparent cornea.Average vascular sheath.Its name speaks for itself.The choroid is responsible for the metabolic processes.It consists of three parts - the iris (the front), the ciliary body (with the help of a lens is attached) and the choroid, which supplies nutrients to cells in the eye and removes products of metabolism.The iris is an opening - the pupil acting as the diaphragm.
Its value is governed by the muscles located on the iris.The inner membrane of the eye - the retina.This optic body sensory apparatus that converts an image into neural impulses and conveys them to the brain.The retina is made up of 10 layers, but in the perception of the image corresponds to only one, which is represented by rods and cones - the light-sensitive cells.Rods are responsible for night vision and cones have a color sensation and irritated only bright light.The largest cluster of cones - the macula.The image got on this site, is transmitted more clearly and fully.A place where there are no rods or cones, - a blind spot.There orbital nerve exits on the other side of the retina and is going through the rest of the brain membrane.
As seers see the world?The light beam reflected from the object to be addressed view, passes through the cornea, the pupil and the fluid chamber.Is refracted by the lens, which has the shape of a biconvex lens, it passes through the vitreous body, and finally reaches the retina.As a result, the image comes in a smaller and upside down to the receptor through which information is made available in the central nervous system.
Sight kids
As children see the world?The vision in children, especially infants, are very different from the work of the visual system of the adult.Immediately after birth the vision is almost connected with consciousness, so kids react poorly to visual stimuli.The very sight at this time they faint, and the macula has not yet emerged.This state lasts for about two weeks.The child then begins to follow the big bright toy, gradually fixing his gaze on her.By two months babies can already distinguish between primary colors and watch the toy that moves up and down and side to side.
How is the vision of the baby?
In 3-4 months the child sees much better.Visual acuity improved.The larger field of view, bright kid moving subjects, the better and faster will develop his visual system.But the size and scope of subjects the child learns only when it begins to move in space.In the meantime, he can catch the sunbeams, try to grab a flower on my mother's dress, or reach for a shadow on the subject.Also at this time it is difficult not only the perception of the volume, but also mistakenly sense of distance.
In the period from two to six months, the baby is formed by the first perception of colors.He first begins to distinguish yellow, orange and red and blue and green color - later.Full color vision ends with the formation to five years.
In six months the child develops grasping reflexes.They become more accurate.At the same time begins to form an idea of the size and distance of the object.The kid is actively exploring the world around great creeps and learns to sit.During this period, in addition to the active development of visual acuity and other visual skills.
With eight months, the child begins to look for a toy when she disappeared from view, drew attention to the details.
Do not be scared if a newborn baby's eyes can look in different directions.This is normal and 1-2 months usually passes.To the doctor should contact only if you squint your baby persists after three months.
At home, check your eyesight in children 1-2 years of easy.Parents watching toddler, he agreed hand-eye movements.These kids have good vision and taking up small objects.Seeing a child of 3-4 years can be checked by a doctor on a special table with pictures.At this age, visual acuity varies within 92%.
As the cat sees?
We figured out how seers see the world, and how children are perceived by others.Now let's talk about animals.
But the animals see the world differently than men.How a cat's charm!What expressive look at which sensitive owners can easily guess that it is experiencing at the moment: the pleasure, fear, curiosity or anger.And how cats see our world?Now a look.
All kittens, as children are born with blue eyes.But in adult cats can meet a variety of colors - blue, yellow, gray, green.Sometimes cat eyes are of different colors, for example, one blue, and one green.Pupils animal vertical.With an abundance of light they turn into a narrow strip, and at dusk can expand up to a centimeter.Since the nerve cells in the retina of a cat is much more sensitive than that of humans, and the vision in her dark better.Because the reflective layer retina of animals, not only cats, glow in the dark if they direct light source.Yet fluffy darling can not, as a man, to distinguish fine details of objects or to consider the things that are very close to it.And because of the inability to focus vision.The best thing she sees at a distance of 2-6 meters.
The cat well developed hunting instinct.She is an excellent notices the smallest movements and can accurately estimate the distance to jump.But if the potential victim will freeze in place, a cat can lose sight of her by surprise.And again to find an object, it will have to slightly change the angle of view, fidgeting or slightly raised.
Recently, scientists agreed that the cat distinguishes between some colors, but do not see the world in black and white, as was previously believed.This blue, green and gray tones.But shades of red are not available to her.
interesting body
addition to the eye, the cat is able to "see" and mustache - whiskers, which are located on the upper lip, above the eyes, chin and elbows.They are her rescue when the range is too dark or have poor eyesight cat.If the animal does not have a mustache, it moves uncertainly and pupils at the same time maximize.But most of the whiskers grow back quickly.Some cat owners may find that their favorite moves, often shaking his head from side to side.It can serve as a signal of poor vision in an animal, and it enjoys a mustache, like a blind man with his cane.
expressive eyes and graceful movements often make the cat target for photo shoots and video filming, not only amateur, but also professional.
Conclusion Now that you know how a person sees the world, we also reviewed in detail how the arranged sight cats.We hope that this information will be useful to you.You can now explain themselves to anyone who asks you, seeing how they see the world.
