Conditions of the eyes have been around as long as mankind has. With the technological improvements provided by science, individuals with eyesight issues were given the ability to see better than before. Eyeglasses are the standard technique to correct vision problems, even with surgical options available.
The eyeball is more than a ball filled with liquid, it has specialized parts which when aligned properly provide vision. The light which shines into the eye is directed to a specific area of the retina, where there are sensors to translate the light and give a picture to the brain. There are several problems than can occur while this is going on.
Since the items in the eyeball must be held in a specific manner, the most common issues deal with the shape of the eyeball itself. If the eyeball is not the correct shape, the internal parts are not in the correct placement to have the light focused to the proper place on the retina. Typically, the light falls short, goes behind or becomes diluted with too many points. All of these refractive problems result in poor visual acuity, and require the need for eyeglasses.
Approximately on quarter of the world has nearsightedness, or myopia. Nearsighted individuals are exactly that, they are able to focus on objects that are close to them, but things far away are a blur. Myopia is caused by an eyeball becoming stretched out in a lengthwise manner instead of being the round ball it should be. Another reason for this condition includes the cornea shape becoming to steep, which forces the light going to the retina to not reach it appropriately.
Farsighted people, or those with hyperopia, have the opposite problem from those with myopia. People who are farsighted are able to see things in the distance very clearly, however anything directly in front of them cannot be focused on. The eyeball in this scenario has become too short, or the cornea is flat which again hampers the ability of incoming light to reach its destination on the retina as it should.
Many people are aware of the effects of aging, vision is no different. An age related vision condition in which the eye muscles weaken or the lens of the eye hardens causing a loss of vision to things close to the individual is termed presbyopia. Most people begin to see the effects of presbyopia in their 40\’s, and this occasion calls for the need of glasses.
Astigmatism is blurred vision caused by the creation of multiple focal points on the retina due to the irregular shape of the eyeball. In this case, the eyeball becomes football shaped. Astigmatism is unique in that it can develop with the conditions of myopia, hyperopia, and presbyopia complicating the visual problems. Astigmatism can be misdiagnosed as one of the other refractive disorders if it presents with the clinical symptoms of farsightedness or nearsightedness.
The best correction treatment for refractive disorders is to use eyeglasses. These therapeutic instruments are being used by the majority of the population which has turned them into a fashion accessory. In addition to eyeglasses, current medicine can offer surgical options to some suffering with vision issues.
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