How much astigmatism is hereditary

Generally speaking, there is no absolute correlation between the heredity of astigmatism and its degree. High astigmatism has a higher probability of being inherited, while the risk of inheritance for mild to moderate astigmatism is relatively lower. If concerned, it is recommended to seek medical advice early. Specific analysis is as follows:

If the astigmatism is high (e.g., exceeding 300 degrees), and one or both parents have high astigmatism, the likelihood of their children inheriting astigmatism increases. This type of astigmatism is often associated with inherited characteristics of corneal shape and internal eye structures. Children may develop similar corneal irregularities or refractive abnormalities during infancy or growth, manifesting as significant astigmatism symptoms.

If the astigmatism is mild (e.g., less than 100 degrees) and there is no clear family history of astigmatism, the probability of inheritance is low. This type is more commonly related to acquired factors such as prolonged poor visual habits, eye injuries, or eyelid pressure. By improving visual habits and maintaining eye health, the occurrence or progression of astigmatism can be reduced, as it is not primarily caused by genetic factors.

Individuals with a family history of astigmatism should pay attention to their children's visual development in early years and schedule regular eye examinations. It is important to cultivate healthy visual habits daily, avoiding prolonged near-work and eye-rubbing. If a child shows symptoms such as blurred vision or head tilting when looking at objects, prompt medical evaluation is essential for early detection and intervention.