What Causes Astigmatism in Children’s Eyes?

　　Astigmatism is a very common eye condition, often occurring alongside myopia (nearsightedness) or hyperopia (farsightedness). The primary cause of astigmatism is inadequate eye care. Although it is not a life-threatening condition, it can still cause significant inconvenience for affected individuals. Therefore, greater emphasis should be placed on prevention in daily life. So, what causes astigmatism in children?

　　What Causes Astigmatism in Children?

　　Possible causes of astigmatism in children include excessive eye strain, congenital corneal developmental abnormalities, and corneal irregularity. Prolonged use of electronic devices such as smartphones—or extended periods of reading or writing—can lead to excessive visual fatigue. Over time, this may result in blurred vision, manifesting as myopia, astigmatism, or other refractive errors. If the cornea exhibits congenital developmental abnormalities, its refractive power will vary across different meridians, leading to astigmatism. Consequently, both distant and near objects appear blurry. Similarly, an irregularly shaped cornea results in inconsistent refractive power across its surface, also causing astigmatism and indistinct vision. Parents should monitor children for signs of astigmatism and arrange timely refraction testing and corrective lens fitting.

　　Astigmatism is a common pediatric eye disorder. First, it may arise from congenital developmental anomalies—often linked to genetic factors. If one or both parents have myopia or astigmatism, their child is at increased risk of developing astigmatism due to irregular development of the cornea and lens, resulting in differing refractive powers along vertical and horizontal meridians. Second, poor visual habits—such as prolonged near work, extended screen time (e.g., smartphones or television), or frequent squinting—can contribute to the development of astigmatism. Third, keratoconus—a condition caused by degeneration of collagen fibers in the corneal stroma—leads to conical protrusion of the cornea and may also cause astigmatism in children.

　　Parents are advised to limit children’s smartphone usage and avoid prolonged gaming sessions. We hope this information proves helpful.