Abstract: the two main symptoms of astigmatism are vision loss and visual fatigue. Myopia astigmatism is no exception. When the degree of astigmatism is not high, if accurate vision is not required for work, there are often no symptoms. When the patient is doing close-up fine work, his eyes are prone to fatigue and temporary blurred vision., Astigmatism is also a kind of ametropia, which means that in the static state of adjustment, the refractive power presents different refractive states due to the different meridians of the eye, so that the parallel light enters the eye, and the main focus in the direction of each meridian can not be focused into a point, so no matter where it is, it can not form a clear object image, which is called astigmatism. Astigmatism can be divided into regular astigmatism and irregular astigmatism., Regular astigmatism means that the curvature of each meridian is inconsistent, and the meridian with the largest curvature is just perpendicular to the meridian with the smallest curvature (that is, the meridian with the largest refractive difference crosses each other vertically). Myopic astigmatism belongs to a type of regular astigmatism, which can be divided into simple myopic astigmatism and compound myopic astigmatism. The so-called simple myopic astigmatism refers to that the refractive state of a main meridian is emmetropia, while the refractive state of the meridian perpendicular to it is myopia; Compound myopic astigmatism means that the refractive states of two mutually perpendicular meridians are myopic., The two main symptoms of astigmatism are decreased vision and visual fatigue. Myopia astigmatism is no exception. When the degree of astigmatism is not high, if accurate vision is not required for work, there are often no symptoms. When patients are doing close-up fine work, their eyes are prone to fatigue and temporary blurred vision. When the eyes are closed or rubbed, they can see better, but patients are often not afraid of such blurred vision, because they may get a clearer vision from one focus to another. However, adjustment is often used in changing focus. When adjusting fatigue, eyesight is blurred and you need to close your eyes for rest. Such changes are also easy to cause fatigue and often have forehead pain., For those with high astigmatism, they often only have blurred vision, and headache or visual fatigue are very light or rare. However, when high astigmatism is close to all correction, these symptoms may occur, which is due to the remaining uncorrected mild astigmatism. In addition, they often have to narrow their eyes to reduce astigmatism; And move the visual object closer in order to obtain a larger retinal image. Myopic astigmatism, although the far vision is very poor, the near vision is still normal or close to normal, and the near vision is often used in daily life and work, which provides an opportunity to exercise the function of myopia. Therefore, myopic astigmatism rarely produces disuse amblyopia.,
astigmatism is also a kind of ametropia, which means that in the static state of adjustment, the refractive power presents different refractive states due to the different meridians of the eyeball, so that when the parallel light enters the eye, the main focus in each meridian direction can not be focused into a point, so no matter where it is, it can not form a clear object image, which is called astigmatism. Astigmatism can be divided into regular astigmatism and irregular astigmatism.
regular astigmatism means that the curvature of each meridian is inconsistent, and the meridian with the largest curvature is just perpendicular to the meridian with the smallest curvature (that is, the meridian with the largest refractive difference crosses each other vertically). Myopic astigmatism belongs to a type of regular astigmatism, which can be divided into simple myopic astigmatism and compound myopic astigmatism. The so-called simple myopic astigmatism refers to that the refractive state of a main meridian is emmetropia, while the refractive state of the meridian perpendicular to it is myopia; Compound myopia astigmatism means that the refractive states of two mutually perpendicular meridians are myopia. The two main symptoms of
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astigmatism are vision loss and visual fatigue. Myopia astigmatism is no exception. When the degree of astigmatism is not high, if accurate vision is not required for work, there are often no symptoms. When patients are doing close-up fine work, their eyes are prone to fatigue and temporary blurred vision. When the eyes are closed or rubbed, they can see better, but patients are often not afraid of such blurred vision, because they may get a clearer vision from one focus to another. However, adjustment is often used in changing focus. When adjusting fatigue, eyesight is blurred and you need to close your eyes for rest. Such changes are also easy to cause fatigue and often have forehead pain.
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for those with high astigmatism, they often have blurred vision only, and headache or visual fatigue are very light or rare. However, when high astigmatism is close to all correction, these symptoms may occur, which is due to the remaining uncorrected mild astigmatism. In addition, they often have to narrow their eyes to reduce astigmatism; And move the visual object closer in order to obtain a larger retinal image. Myopic astigmatism, although the far vision is very poor, the near vision is still normal or close to normal, and the near vision is often used in daily life and work, which provides an exercise opportunity for the function of myopia. Therefore, myopic astigmatism rarely produces disuse amblyopia.