What gives us the glasses?
Florentines, likely mistaken belief that the inventor of the lenses now routinely used to correct refractive errors, was their fellow citizen Salvino Armati.About the homeland of this invention, many argue, however, well aware that it was done in the period earlier than the one in which he lived Salvino Armati.The Romans, at least, must have known something about the art of eye power additions.Pliny wrote that Nero in order to watch the games at the Coliseum, used a concave gem, framed for this purpose in the ring.However, if citizens Salvino Armati believe that he was the first who created these helpers of view, it would be examined thoroughly pray for forgiveness of his sins.Despite the fact that they have improved the vision of some people and relieve their pain and discomfort to others, they were simply additional torment.Points are always harmful, large or small.Even the best of them will never improve the view to its normal state.
In that glasses can not improve the view to its normal state, is ea
What glasses should bring harm to your eyes, it is obvious from the facts set forth in the preceding article.Man can not see through them if he does not have the degree of refractive error, which points need to be adjusted.However, refractive anomalies in the eye, which is left to itself, never constant.Therefore, if a person provides a good vision with the help of concave, convex, or astigmatic lenses, which means that it keeps constantly a degree of refractive error, which in other circumstances would not have remained constant.The only result of this situation, we should expect deterioration.Experience shows that usually occurs as well.
After one day people wearing glasses, the strength of their lenses in most cases, should grow steadily, to maintain the degree of visual acuity, which provide the first pair of glasses.People with presbyopia who put on glasses because they could not read the fine print, also often find that after they wore them for a while, they can not have without their help, read a larger font, which is primarily easythey were given.One patient with myopia 20/70, who had put on glasses, which provided him with 20/20 vision, found that just a week to the naked eye vision had deteriorated to 20/200.When people break their glasses and go without them for a week or two, they often find that their vision improved.In fact, the vision always improves to a greater or lesser degree, when the glasses are removed, even though people do not always pay for it their attention.
No one can deny the fact that the human eye is "outraged" glasses.Every ophthalmologist knows that patients should "get used" to them and that in some cases this addiction can not be achieved.Patients with high degrees of myopia and hyperopia are experiencing great difficulty in adjusting to a full correction.Often this can not be achieved at all.Strong concave lens required for high myopia, create the illusion that all objects are much smaller than the actual dimensions.At the same time, the convex lens size increases.All this is frustrating and overwhelming.Patients with a high degree of astigmatism suffer from the very unpleasant feeling when you first put on sunglasses.So warn them so that they become accustomed to the first points at home before you dare to go out.Typically, these difficulties can be overcome, but often not.Sometimes it also happens that those who are well enough to tolerate glasses and afternoon can not possibly achieve habituation to them in the evening.All glasses
more or less narrow field of view.Even with very weak glasses patients can not see clearly, if you do not look through the lens center.The frame in this case must be disposed at right angles to the line of sight.If they do not, in addition to reduced vision, sometimes there are those annoying symptoms such as dizziness and headache.Thus, freely rotate their eyes in different directions they can not.Of course, points today must be designed so that it was theoretically possible to look through them at any angle, but in practice is rarely achieved the desired result.
difficulties with maintaining points in a pure state, only one of the minor inconvenience of the glasses, but it is perhaps the most unpleasant of them.In damp and rainy days are covered by drops of water glasses.On hot days sweat leads to the same result.On cold days they are often short of breath misted moisture.Every day they are so frequently exposed to contamination by moisture, dust, fingerprints from accidental touches hands that rarely allow you to see objects without any interference.
Reflections strong light on glasses are also very unpleasant, and the street can be very dangerous.
military, sailors, athletes, people and physical heap of children experience considerable inconvenience to wear glasses because of their way of life and activity.It not only leads to the fact that glasses are broken, but often knocking them correct focus, especially in the case of astigmatism.
What points disfigure a person's appearance may seem unworthy of consideration is the fact.However, the mental discomfort does not improve the overall health of pi, or vision.Despite the fact that we have come so far in the creation of the virtues of points that we consider wearing them part of your life, there is still a bit of unspoilt minds, for whom wearing glasses just unpleasant and vision with which points away from an acceptable level.When the glasses have a child, then there will be compressed at the heart of any man.
generation ago glasses were used only as an aid to the visually impaired.Today, they are prescribed to many people that they can not see as well or even better.It is believed that the hyperopic eye is able to cope to some extent with its difficulties by altering the curvature of the lens through the action of the ciliary muscle.The eye with simple myopia is not endowed with this ability, since the increase in the convexity of the lens (which is believed to be the only result of accommodative effort) would only increase the difficulty.But myopia usually accompanied by astigmatism, and it is considered, it can be partially overcome by changing the curvature of the lens.Thus, the theory leads us to conclude that the eye in which there is any error of refraction, almost never
free when it is open, from abnormal accommodative efforts.
In other words, it is believed that the supposed muscle of accommodation is forced to bear the burden not only to the usual focus on changing the eye for vision at different distances, but also an additional burden to compensate for refractive errors.Such adjustments, if they actually occurred naturally would lead to a strong tension of the nervous system.To reduce this stress (which is considered to cause a plurality of functional nerve disorders), the extent to improve vision, prescribed points.
However, it was proved that the lens is not a factor in the implementation of any accommodation, any correction of refractive errors.Consequently, under no circumstances, can not exist, and the stress state of the ciliary muscle, which should be reduced.It was also proved that when the vision is normal, there is no refractive error, and external (outside) of the eyeball muscles are at rest.Consequently, there is no state of stress and external muscles, which would have to act in such cases.When there is any tension of these muscles, glasses can correct its impact on the refraction, but the very power they can not remove.Conversely, as shown, to make glasses should existing condition worse.
However, people with normal vision who wear glasses in order to reduce the estimated muscle tension, often benefit from it.It is an amazing illustration of the effect of mental suggestion.Flat glass, if it were possible to convince people the same confidence would give the same result.In fact, many patients have told me how they got rid of various discomforts by glasses.The rims of the glasses, as I discovered, was a simple flat glass.One of these patients was an optician, he built himself such points and not have any illusions in their relationship.Nevertheless, he assured me that he does not wear them, his headaches.
Some patients amenable to suggestion so much that you can reduce their discomfort or improve their vision almost any points that you want to wear them.I have seen people with gipermetroniey, more comfortably wearing glasses for myopic, people who have no astigmatism, but gets great satisfaction from glasses to correct this defect of vision.
Many people will not even think that they see better with glasses, which are in fact significantly impair their vision.A few years ago a patient, which I prescribed glasses consulted an ophthalmologist whose reputation was much higher than mine.He gave the patient a different pair of glasses, disparaging comments about the glasses that I had prescribed.The patient came back to me and began to tell how much better he sees with the second pair of points, rather than the first.I tested his sight with new glasses and found that, while my glasses provide 20/20 vision, my colleague points gave him a 20/40 vision.The reason for this was that he was just mesmerized by the enormous prestige of the ophthalmologist, assuring himself that he sees better, but actually seen worse.Convincing as it was hard to reverse, although he agreed with the fact that when he looks at the test with new glasses, he sees only half of what I saw with the old.
When glasses do not relieve headaches and other symptoms of nervous origin, it is assumed that this is due to their wrong selection.Some doctors and their patients exhibit a remarkable degree of patience and perseverance in their joint attempts to approach the proper prescriptions.One patient suffering from severe pains at the base of the skull, only one doctor 60 times the chosen points!Before that he visited many other eye doctors and neurologists, both here and in Europe.His pain was able to take off in five minutes by the methods described on our website.At the same moment of time the patient was normal.
Lucky to the many people who had been prescribed glasses, but who refused to wear them, thus avoiding not only uncomfortable, but also significant damage to their eyes.Others, having less independence of thought, a greater proportion of the spirit of the martyr, or being far more frightened optometrist undergo unnecessary inconceivable torture.One such patient wore glasses for 25 years, although they did not save it from prolonged suffering and so much vision worsened, she was forced to watch over them, when I wanted to see something in the distance.Her oculist assured that she would be waiting for a much more serious consequences if she did not wear glasses, and was very angry that she was looking over his glasses, instead of looking through them.Given that the refractive anomalies are constantly changing from day to day, from hour to hour, from minute to minute, even under the influence of atropine, an accurate selection of glasses, of course, impossible.In some cases, these fluctuations are so widespread or so the patient is immune to mental suggestion that corrective lenses can not be achieved no relief, and they will inevitably become an additional disadvantage.Even in the best case it can not be considered that the glasses - is more than a very unsatisfactory substitute for normal vision.