Astigmatism in children is mainly caused by congenital and acquired factors, and needs to be corrected as early as possible when it affects normal vision. 1. Congenital factors: irregularities in the shape of the cornea or lens that exist at birth can cause congenital astigmatism. 2. Acquired factors: Eyelids with granuloma or long-term poor eye use may lead to eyelid pressure on the cornea, causing the cornea to change its curvature, thus causing astigmatism; corneal ulcers, corneal scarring, etc., will lead to the corneal surface unevenness, which may also cause astigmatism. Astigmatism in children can lead to visual fatigue, vision loss, and the need for timely correction when it affects vision, so as not to affect their lives and studies.