Keep Your Eyes Healthy
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Eyestrain
Eyestrain is one of the common conditions that everyone talks about. Unsuspected eyestrain may be associated with twitching of the eyelids and face. It may be responsible for nausea and vomiting, for headache, bad nutrition, loss of appetite, and many other similar conditions. Yet the only way to determine whether or not eyestrain actually exists is to make a suitable examination of the ability of the eyes to see, and then to overcome the condition by rest and the provision of eyeglasses.
Motion pictures have been incriminated as a cause of eyestrain and tiredness. Under normal conditions moving pictures do not cause serious fatigue of the eye. However, the wrong type of lighting in a motion picture house, films that are jerky or spotted or badly lighted, and long periods of projection without change in the light will produce serious fatigue of the eye.
Suitable eyeglasses are prescribed nowadays for vision that is deficient or for the correction of the curves in the eyeball that result in astigmatism.
When eye glasses first became popular they were frequently prescribed when they were not necessary. Everybody who had his eyes examined felt that he simply had to have glasses in order to justify the examination. Today the reaction against this results in the development of fakirs who try to get people to throwaway their glasses.
There are three chief reasons for wearing glasses: to protect the eyes, to see well, and to see without fatigue. An eyeglass is a crutch to aid a deficient or weakened eye, exactly as an ordinary crutch aids a weakened limb. A crutch lends support until the limb is capable of working for itself. A permanently deformed limb or an eye of which the structure is anatomically wrong demands permanent use of a crutch or eyeglass.
Proper glasses can relieve eyestrain; improper glasses may make the condition more severe. Not only is your eye the window of your soul, but it is a barometer for measuring the health of your body. By looking into your eyes, visualizing their interior through the use of the ophthalmoscope, and by measuring certain of their reactions the physician can tell a great deal about your body generally.
Not only does the body reflect to some extent bad conditions of the eye, but the eye can reflect troubles elsewhere in the human body. When the doctor notes that your eyes are clear and bright, he diagnoses at once a fairly good state of health. A condition such as jaundice shows itself in yellowness of the eyeball. Frequently trouble in the brain or in the nervous system may be found by looking into the back of the eye with the ophthalmoscope. Certain conditions, such as alcoholism, rheumatism, gout, diabetes, and poisoning of the body by various metallic substances, reveal themselves in changes back of the eye.
Spots Before The Eyes
One of the most common symptoms complained of by many people is a sense of spots floating before the eyes. Scientifically, these are called muscae volitantes. The specialist in diseases of the eye attaches little significance to these spots, unless such spots can be seen on special examination of the eye with the ophthalmoscope, the instrument with which the specialist looks into the eye. These floating spots have been attributed to irritations of the eye, to congestion of the tissues, to eyestrain, and various constitutional diseases. Generally speaking, they are not important. If the person concerned has the right kind of glasses and keeps himself in good physical condition the spots will disappear.
Sparks And Flashes
Many persons complain also of sparks or flashes of light. These are sometimes due to disturbances of the circulation of the blood of the eye. In cases in which one of the lining membranes of the eye may be inflamed the sensation of dazzling flashes of light of various colors may be very pronounced.
Some people complain particularly of constant showers of golden dust or of large numbers of black specks floating in front of the eyes or of stationary spots of large sizes. In many instances these are due to difficulties of color vision or of vision generally. Sometimes the wearing of blue-colored glasses, which cut off the red rays, will relieve the person concerned of his symptoms.
No doubt the best advice that can possibly be given to people generally is to tell them to see a competent specialist in diseases of the eyes at least once each year, and not to take lightly any disturbance of vision. The eye, once damaged, does not recover with ease; neither does any other highly-specialized organ of the body. Disturbances seen early are treated to better advantage than if there is considerable delay.
Color Blindness
A Quaker bought himself some scarlet stockings when he thought he was purchasing dark brown. His name was John Dalton, and he is the first scientifically-recorded instance of color blindness. Dalton was an eminent English physicist. It is said that he was walking down the street wearing his cap and gown and the red stockings at Oxford, where a degree had just been conferred upon him, and that one of his brother Quakers promptly took him to task for wearing such colors in public.
Color blindness is more common in boys than in girls. It is exceedingly important today, because the signals on the railroads and on street comers are most frequently red, green, and yellow, but occasionally also blue, and these are the colors most frequently concerned in color blindness. Certainly no one who happens to be handicapped with this condition should attempt to drive a motor car in modem traffic. The difficulty of distinguishing between red and green is the most common form of color blindness. The blue-yellow difficulty is much rarer. People who have color blindness see objects as lighter or darker but are unable to distinguish the shades. Sometimes they distinguish between the red and the green lights on roadways by their difference in brightness.
There is no specific cure for color blindness, since the defect is one of structure of the eye. However, as has already been mentioned, there are various ways in which the color vision may be developed or substitutions found. In testing for color blindness the most common test involves the sorting of a number of colored worsteds. The person who is being tested is given certain pieces and asked to match them with others. There are other tests in which colored strips of paper are sometimes employed. One color-blind woman, who was an excellent seamstress, was able to do sewing provided her family would tell her the colors of the thread.
She was able to remember them by having each color in a different place in the workbox. So significant is color blindness today in relationship to accident that every person who attempts to drive a motor car or to indulge in any other occupation in which color detection is significant should have a test as soon as possible.
The Navy and the Air Force do not admit men who are color-blind. A few have gained admission by learning the tests. There is no cure for color blindness. If a boy is smart enough to learn the tests so that he can pass them, the Army can probably find a place for him. |
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Author Resource:-
David Crawford is the CEO and owner of a Male Enhancement Products company known as Male Enhancement Group which is dedicated to researching and comparing male enhancement products in order to determine which male enhancement product is safer and more effective than other products on the market. Copyright 2010 David Crawford of http://www.maleenhancementgroup.com This article may be freely distributed if this resource box stays attached.
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By :
Daviedon Crawfordons
Submitted
2010-04-13 23:16:04 |
Article From Article Mayhem
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