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