Will nearsightedness and astigmatism lead to blindness?

Written by Tao Yuan
Ophthalmology
Updated on September 21, 2024
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Myopia and astigmatism are common eye diseases and belong to two types of refractive errors, which can occur together. Myopia combined with astigmatism can lead to a decrease in vision, but it will not cause blindness. For patients with myopia and astigmatism, there are various methods to correct and treat these conditions, such as wearing frame glasses, rigid corneal contact lenses, undergoing laser surgery, or implanting artificial lenses to restore vision. In daily life, it is also important to develop good eye habits, avoiding using eyes in dim and shaking environments, and reducing the time spent on smartphones, TVs, and computers to prevent and delay the progression of myopia and astigmatism.

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Written by Tao Yuan
Ophthalmology
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Can you wear contact lenses with 200 degrees of astigmatism?

Astigmatism of 200 degrees or less can be corrected by wearing regular contact lenses. However, when purchasing lenses, one needs to divide the astigmatism diopter by two and incorporate it into the prescription for myopia during the fitting process. If a patient's astigmatism exceeds 200 degrees, they typically are not suitable for regular contact lenses. Instead, they may opt for custom contact lenses with astigmatism correction or use rigid corneal contact lenses for correction. Patients with astigmatism should promptly visit an ophthalmology department at a hospital for an optometry examination to accurately determine their astigmatism and undergo vision correction tests. Following this, a doctor will issue a prescription for fitting contact lenses.

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Written by Tao Yuan
Ophthalmology
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Do you need to wear glasses long-term if you have more than 200 degrees of astigmatism?

Patients with astigmatism of more than 200 degrees generally need to wear glasses long-term. Astigmatism of over 200 degrees is considered moderate and can significantly affect vision. If glasses are not worn to correct this, the patient's unaided vision is usually poor, causing blurriness and inconvenience in work and daily life. Additionally, prolonged unclear vision can easily lead to eye strain, and may even cause symptoms such as eye soreness, dizziness, and headaches. Astigmatism can be diagnosed through an optometric examination, which will determine the specific degree of astigmatism and its axis. Glasses can then be prescribed to correct it. If the patient is an adult who does not wish to wear glasses, laser surgery or the implantation of a posterior chamber intraocular lens can also be considered as treatment options.

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Written by Hu Shu Fang
Ophthalmology
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Astigmatism refers to a type of refractive error in which the eye does not focus light evenly onto the retina, often due to an irregular shape of the cornea or lens.

Astigmatism is a type of refractive error. Because our eyes are not a perfect sphere, they are more like an egg shape, with different meridians having different refractive powers. Thus, after imaging, the axial images may form in front of or behind the retina, rather than forming a focal point on the retina. Normally, astigmatism of some small degrees and with good axial alignment may not significantly affect vision. However, high degrees of astigmatism, especially irregular astigmatism, will definitely impact visual quality and require the prescription of special lenses to correct the astigmatism.

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Written by Wang Fang
Ophthalmology
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Will astigmatism cause the pupils to enlarge?

Astigmatism of the eye is a type of refractive error caused by an uneven curvature of the cornea's surface, resulting in different refractive powers along different axes. Once astigmatism occurs, particularly with a high degree of astigmatism, there can be a noticeable decrease in vision, distortion in sight, or in severe cases, significant eye fatigue. However, it generally does not lead to pupil dilation. Pupil dilation is caused by the paralysis of the ciliary muscle due to internal and external factors, resulting in enlarged pupils. Therefore, if symptoms of astigmatism appear, it is advisable to visit a hospital promptly for accurate diagnosis and appropriate treatment.

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Written by Wang Fang
Ophthalmology
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What foods should be eaten for astigmatism?

For astigmatism, it is important in daily life to consume a diet rich in proteins, vitamins, and carotenes, such as meat, eggs, dairy, various fresh fruits and vegetables, and carrots. It is advisable to avoid spicy and irritating foods. If astigmatism occurs, it is important to visit a hospital for an optometric examination promptly. If there is significant astigmatism, it should be corrected with glasses based on a medical optometric examination, as uncorrected astigmatism can lead to severe eye strain over time.