Which is more severe: astigmatism or myopia?

Myopia (nearsightedness) and astigmatism are common refractive errors encountered in daily life, both of which can lead to decreased visual acuity. Many individuals wear corrective eyeglasses to improve their vision; however, glasses often cause considerable inconvenience in everyday activities. In particular, during winter months, lenses frequently fog up, prompting some myopic individuals to opt for laser vision correction surgery to restore clear vision and eliminate their dependence on glasses. So, which is more serious—astigmatism or myopia?

Which Is More Serious: Astigmatism or Myopia?

At comparable degrees of refractive error, astigmatism tends to be more problematic than myopia because its symptoms are often more severe and require prompt correction. Individuals with astigmatism typically experience greater visual blurriness than those with myopia alone. While myopic patients see clearly at near distances but poorly at far distances, those with astigmatism often suffer from blurred vision at both near and far distances. Moreover, visual fatigue is generally more pronounced in astigmatic patients than in myopic ones. Without proper correction of significant astigmatism, individuals wearing glasses will experience markedly blurred vision and increased eye strain. To compensate, patients often overuse their ciliary muscles—the intraocular muscles responsible for accommodation—leading to excessive ciliary muscle contraction and resultant ocular fatigue.

The relative severity of myopia versus astigmatism depends primarily on which condition has a greater negative impact on overall visual quality. Patients with mild-to-moderate myopia who have no concurrent astigmatism generally enjoy better visual quality than those with combined myopia and astigmatism. In contrast, individuals with even low-to-moderate levels of astigmatism often report significantly reduced visual clarity and image distortion—perceiving objects as blurry and scattered. Notably, while high myopia itself carries substantial risks, astigmatism is far more prevalent and exerts a disproportionately large influence on subjective visual quality. Ultimately, the “more serious” condition is determined by whichever impairs visual function and quality to a greater extent.

We recommend that patients maintain good general health and strengthen their immune system through appropriate lifestyle measures in daily life. We hope this information proves helpful to you.