Myopia With Astigmatism
Some of the people still question the difference between Myopia or Astigmatism.
Therefore, we need to know and understand more deeply difference between Myopia and Astigmatism.
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Myopia or nearsightedness is a defect refractive eye in which the resulting image is in front of the retina when accommodation in a relaxed state.
Myopia can occur because the eyeball is too long or because the curvature of the cornea is too large so that light does not enter is well focused and distant objects appear blurry.
Patients with this disease cannot see at a distance and can be helped by using negative (concave) glasses. Myopia With Astigmatism.
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Nearsightedness that occurs in the eye or often known as minus eye turns out to be caused by the eye being forced constantly to work hard.
As a result, Even distance vision will be blurry and unclear. Myopia With Astigmatism.
Myopia or nearsightedness is a refractive error of the eye in which the produced in front of the retina when accommodation is relaxed.
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Myopia can occurs because the eyeball is too long or because of the curvature of the cornea too large so that the incoming light is not focused properly and distant objects looks blurry.
Whereas astigmatism is an optical defect in which vision is blurred due to the optical inability of the eye to focus point objects into a focused image sharp on the retina.
This may be due to irregular curvature or toric
of the cornea or lens. Myopia With Astigmatism.
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The causes of myopia can be hereditary, visual tension or other factors environment.
Hereditary factors on myopia are less influential than tension factors visual.
The occurrence of myopia is more influenced by how a person uses his eyesight, in this case someone who spends most of his time in front of the computer or someone who spends a lot of time with reading without rest will be more likely to suffer from myopia.
Environmental factors can also affect, for example, night blindness caused by difficulty of the eye to focus light and dilation of the pupil, both due to lack of light, causing light to enter the eye not well focused. Myopia With Astigmatism.
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While astigmatism or cylinder is an optical defect where the vision is blurred due to the inability of the optics of the eye to focus on point objects into a sharply focused image on the retina.
This may be caused by Irregular or toric curvature of the cornea or lens.
In general, nearsighted people experience a minus increase.
Increase minus little by little at the age of more than 18 years, probably caused by
forcing environmental factors. Myopia With Astigmatism.
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For example, a work environment that requires constantly looking at the screen or working in a slightly dark place.
Unlike the minus, the cylinder tends not to increase when we use the right size for glasses or contact lenses.
Cylinders will actually increase if we do not use the original size.
Signs and symptoms of astigmatism include:
blurred or distorted vision, eye fatigue, headache.
In general, once given the actual size the cylinder will remain at that size. Myopia With Astigmatism.
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In optically if light falls on a gentle curve then the image is cast too close to the retina, on the other hand, in steep curvature, the image is printed too away from the retina.
Then a double image is created or split into several.
From the picture, the line at 12 o’clock to one o’clock is clearly visible or more black, compared to the other lines. Myopia With Astigmatism.
This shows that at that angle the image falls on the retina.
While at three o’clock to 4 o’clock it looks blurry or out of focus, this indicates that at that angle the image does not fall on the
retina correctly (can be in front of or behind the retina). Myopia With Astigmatism.
The conclusion is a function cylindrical lens to unite images so that they become one image only and precisely fall on the retina.
Where before wearing a cylindrical lens, the image falls on some place so as to form the object of the image that is seen seems to be double or broken. Myopia With Astigmatism.
By knowing the difference between myopia (minus eye) and astigmatism (cylinder), you can certainly better understand the problem with your vision.
In addition, you also need to have your eyes checked every six months for know your eye health. Myopia With Astigmatism.
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