Why can the eye astigmatism

Eye astigmatism is not genetic, trauma or surgery, bad eye habits and other factors.

1, genetic

majority of astigmatism and genetic factors are closely related, if either parent has astigmatism, the next generation detected astigmatism is higher than the parents without astigmatism.

2, trauma or surgery such

as eye trauma or accept various types of surgery, may lead to changes in the curvature of the cornea, lens, and thus cause astigmatism.

3, bad eye habits

If usually long and close eyes, reading in dim light environment, easy to induce astigmatism formation.