Duke Peterson Vision Without Glasses Review - How does the eye and how it works

 

Poor eyesight is now more prevalent than ever before. This is due, mainly, increasing dependence on artificial light and the widespread habit of watching TV.And, since the situation is likely worse than better, it is reasonable to assume that the number of people with visual impairments will rise at a much faster rate.
Tried to solve the problem with glasses, but it's an artificial "medicine" is not able to stop the growing threat to human health, this solution is palliative. In fact, no one hopes to cure those with low vision glasses. The most that they can do - is to somehow reduce the discomfort.

Many people would agree that glasses spoil the view, moreover, there is always a risk to break them and get hurt, glasses do not allow many people to play sports, etc. And yet, despite all this, the points are, of course, one of the greatest achievements of civilization. Easy to understand such a high evaluation scores: without them, millions of people will not be able to do what they do.But it's all due to the fact that people tend to think that visual defects are incurable and the only possible means are points. Belief in the value and necessity of glasses firmly rooted in people's minds. It is based on the assumption that the majority of defects is due to irreversible changes in the shape of the eye and, therefore, all you can do - is to facilitate the selection of the current state of the lens.

Studies Duke Peterson of New York, which lasted thirty years, allowed a new way to consider the causes and treatment of defects of vision. As it turned out, most of the visual defects do not occur because of irreversible changes in the shape eyes, but only because of the functional disorders, which in most cases can be overcome with simple, natural methods of treatment, Duke Peterson Vision Without Glasses.

How does the eye and how it works
To understand the essence of the method to improve vision, proposed by Duke Peterson, it is necessary to recall the anatomy and physiology of the eye, and most importantly - the phenomenon of accommodation. Accommodation - the ability of the eye to see near and far objects equally well.

The eye, the eyeball is nearly spherical shape of approximately 2.5 cm in diameter. It consists of multiple shells, three of them - basic: sclera - the outer shell, Cardiovascular - average, the retina - the inner.

The sclera is white with a milky hue, except the front part which is transparent and is called the cornea. Light enters through the cornea into the eye. Choroid, the middle layer contains blood vessels that carry blood supply to the eye. Directly beneath the cornea the choroid passes into the iris, which determines eye color. At its center is the pupil. Behind the iris is the lens, like a convex lens, which captures the light as it passes through the pupil and is focused on the retina. Around the lens of the choroid forms the ciliary body, which had the muscle to regulate the curvature of the lens.

The retina is actually a continuation of the optic nerve (located on the back of the eye). She is very thin and delicate, her projected images of external objects in the field of view. If the retina is impaired, sight is impossible. Given these facts, it is easier to understand the process of vision.

Light rays pass through the cornea, the outer rays are limited to the pupil, and only the remaining central rays actually fall into the eye. They pass through the lens, which, having a convex shape, reduces the (focus) of the retina so that it forms an inverted image. This image is transmitted through the optic nerve to the brain, and as a result we see.

If at least one link in this chain is a hindrance, it is impossible to normal vision.
Accommodation. When the eye looks at a distant object, the distance between the lens and the retina is less than normal, and conversely, larger than normal when a person looks at an object, located close by.

In medical textbooks explained that the change of this distance is due to stretching and compression of the lens, which, in turn, is regulated by ciliary muscle. According to this view of the eye as a whole does not change its shape - just the lens.

However, experiments have shown that the shape of the eye still in the process of changing accommodation, due to the action of external muscles of the eyeball, which control the movement of the eyes in all directions (up, down, sideways). It was found that by reducing certain groups of muscles are approaching the back (wall) eyes to the lens, when a man looks at a distant object, ie, the shape of the eye changes its longitudinal axis becomes shorter, but becomes longer when the object is considered a close .

If you understand the fact that myopia (nearsightedness) is a condition where the eyeball is elongated, stretched, and hyperopia (farsightedness) and presbyopia (presbyopia) is a condition in which the eyeball is reduced, compressed along its longitudinal axis (along the line between lens and retina), it becomes clear that such states are entirely the result of improper accommodation due to malfunction of the external eye muscles. In myopia the eye is constantly in a state that makes the normal vision of distant objects, as in the case of hyperopia, on the contrary, close objects.

In short, the practice of Duke Peterson led him to conclude that many cases of visual disturbances are the result of external stresses the eye muscles that cause the eye to change its shape in time.