Is 25 degrees of astigmatism severe?

　　Astigmatism is a very common refractive error. In individuals with astigmatism, the degree of astigmatism typically remains relatively stable and does not increase or decrease with age. Depending on the underlying cause, appropriate corrective measures can be selected to restore normal vision. So, is 25 diopters (D) of astigmatism considered severe?

　Is 25-D Astigmatism Severe?

　　No, 25-D astigmatism is not severe. It falls within the range of normal physiological variation. Such a low degree of astigmatism does not significantly impair visual quality nor cause noticeable deterioration in visual function. Therefore, when astigmatism measures 25 D, it is advisable to promptly visit an optometry clinic for a slit-lamp biomicroscopic examination of the ocular surface to rule out inflammatory conditions such as conjunctivitis, keratitis, scleritis, or iritis. If mild astigmatism arises secondary to inflammation, timely anti-inflammatory treatment—such as topical pranoprofen eye drops—may be warranted to reduce the associated astigmatic component.

　　There are numerous causes of astigmatism. When astigmatism is severe, it is often congenital—primarily resulting from genetically determined structural abnormalities of the eye. Additionally, poor eye habits—such as prolonged pressure on the eyes—may contribute to the development of astigmatism. In some cases, astigmatism may be secondary to underlying ocular disease.

　　Individuals with astigmatism should take care to avoid eye strain in daily life and refrain from staying up late at night, allowing the eyes adequate time to fully relax. We hope this information proves helpful to you.