4-year-old child eye astigmatism is how to return a responsibility

4-year-old children's astigmatism is not genetic, trauma or surgery, bad eye habits and other factors related.

1,

most of the genetic astigmatism and congenital factors, if either parent has astigmatism, then children or adolescents astigmatism detection rate is higher than the parents without astigmatism crowd.

2, trauma or surgery such

as eye trauma, eye surgery, etc., can lead to changes in the curvature of the cornea and lens, but also cause astigmatism.

3, bad eye habits such

as usually long-term close to the eye, reading in dim light or eye fatigue, etc., there is also a certain chance that astigmatism will be induced.