One of the popular eye vision problems is the inability to focus incoming light precisely onto the retina. The result is blurred vision.
In fact, there are four kinds of focusing errors:
1. Nearsightedness
Nearsighted people see near objects more clearly than objects farther away. In nearsightedness (myopia), light rays from distant objects are focused not onto the retina but in front of the retina. Nearsightedness occurs because the cornea and the crystalline lens together have too much focusing power for the length of the eye. If the cornea and the crystalline lens had less combined focusing power, or if the eye were shorter, then the light rays would be focused precisely onto the retina.
2. Farsightedness
Farsighted people see faraway objects more clearly than they see nearby objects. In mild cases of farsightedness, or in younger people, only near objects will be blurry. In moderate cases, or in older people, both far and near vision will be blurry, but the near vision will be more affected. Farsightedness (hyperopia) results when the cornea and crystalline lens together have too little focusing power for the length of the eye. Light rays from distant objects are focused not onto the retina but behind the retina. If the cornea and the crystalline lens had more combined focusing power, of if the eye were longer, then the light rays would be focused precisely onto the retina.
3. Astigmatism
Another kind of eye vision problems is called astigmatism. People whose eyes focus light rays unevenly have astigmatism. Astigmatism occurs when the cornea has an irregular shape. The cornea should be round and symmetrical like a basketball, but in cases of astigmatism it is shaped more like a football or the back of a spoon. People with astigmatism see both near and far objects out of the focus. Astigmatism frequently accompanies nearsightedness or farsightedness.
4. Presbyopia
Presbyopia refers to the gradual loss, as we age, of the eye's ability to adjust the focus from far to near. Presbyopia is a normal part of the aging process, affecting each and every person, and usually begins to cause a problem with near vision between the ages of forty and fifty. It is corrected by the use of reading glasses or bifocals. Presbyopia occurs because the crystalline lens no adequately adjusts its shape to focus clearly on close up objects. Presbyopia is referred to "farsightedness" by most people and is frequently confused with true farsightedness. Presbyopia and hyperpobia are confused because both compromise up-close vision, though in entirely different ways. Presbyopia is an age-related loss of flexibility of the crystalline lens. Hyperobia is caused by too little focusing power in the eye - combination of the cornea, the crystalline lens, and length of the eye. Whereas presbyopia is an aging affect that begins to be experienced sometime after thirty five years of age, hyperopia affects all people even children.
Did you know that most eye vision problems can be corrected naturally? It means you do not have to undergo a surgery.
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How To Treat Astigmatism
