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Home Medical and Vet Remedies, as Recommended by 19th and 20th century Doctors and Vets! |
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Home Medical and Vet Remedies, as Recommended by 19th and 20th century Doctors and Vets! |
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Far-Sight.The result of this improper formation of the eye is, in one respect, similar to the effect of excessive depth of the eye ; that is, the range of the patient's vision is not so great as that of a person with a natural eye. In this case, however, the difficulty is not that the individual is unable to see distant objects, but that he cannot distinguish near objects. His vision is good for everything which is not situated within a few feet of the eye. This condition is, therefore, called far-sightedness, or long-sightedness. These two opposite conditions of the eye, excessive depth in the one case-near-sightedness - and unnatural shallowness in the other case - farsightedness - are often indicated to a certain extent by the form of the eye. Thus an individual whose eyes are near-sighted in a high degree, often has a peculiar staring expression, which is found upon inspection to be due to a protrusion of the eyeballs This protrusion seems to be due to the extreme length of the eye from before backward. The far-sighted individual, on the other hand, has often unusually flat eyes, an appearance due to the shortness of the eye from before backward. Just as near-sightedness is technically called myopia, so farsightedness is medically designated hypermetropia. Farsightedness - an unnatural shallowness of the eye - is more apt to escape notice than near-sightedness. The near-sighted child is apt to betray his defect of vision even to one who is not seeking to examine the state of his sight; for he will often express his inability to see objects which are plainly discernible to his companions. The far-sighted person, on the other hand, does not have so many opportunities for revealing to himself as well as to others the existence of any defect of vision ; for he is enabled to see in the distance as well as anybody else, and can distinguish ordinarily small objects by holding them a little further from the eye than others do. Since the defect of the far-sighted eye consists in its inability to see near objects, it is evident that the defect will be detected during the individual's efforts to read, write, or engage in other pursuits requiring close application of the eyes. Such efforts are apt to be accompanied, even in early years, by fatigue and pain in the eyes, which is often followed by a dimness of vision, since the eye actually becomes unable to maintain the strain necessary for seeing near objects. After resting a time the individual can again read with perfect ease, but is again compelled, after a short time, to discontinue the employment by the pain, weariness and sense of effort in the eyes. A curious feature about farsightedness is, that the subject of it sometimes acquires a habit which we would suppose would be monopolized by near-sighted individuals ; he habitually holds a book at an unusually short distance from the eye ; in consequence of this the friends often remark that the person is near-sighted, though examination discloses the error of this belief. The explanation seems to be that by bringing the object near the eye, clearness of vision is increased, because the images formed upon the retina are larger than when they are held further away. If the person is required to employ the eyes upon fine work constantly, these organs become red, irritable, bloodshot, and often discharge a small amount of mucus. This discharge will be noticed by the patient in the morning upon rising. The patient will notice that the condition of his eyes is much improved by simple absence from his occupation for a day ; thus they are usually much better on Monday after resting from work on Sunday. It is, therefore, important that every person who has symptoms of this kind should ascertain by consulting a competent surgeon, whether or not the symptoms originate in this condition of hypermetropia. Such individuals are very apt to content themselves with a remark to which they have been accustomed from childhood, namely, that they " have weak eyes. " This weakness of the eyes can be easily remedied by the use of proper glasses. If not remedied, the irritation and frequent inflammations will gradually result in serious disease of the eye which may prove exceedingly obstinate to treatment. The cure for farsightedness, like that for near-sightedness, is in the use of spectacles. In early life these spectacles may be quite weak ; but in advanced life, when the crystalline lens of the eye becomes hardened, it will become necessary for the patient to increase the strength of the glasses. In this respect, therefore, hypermetropia differs from myopia, since in the latter condition the glasses required by the patient may be weaker than those which he needed in childhood. But first, if you want to come back to this web site again, just add it to your bookmarks or favorites now! Then you'll find it easy! Also, please consider sharing our helpful website with your online friends.
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