Mild astigmatism in a pediatric rule does not usually affect vision. When moderate to high astigmatism is present, it will manifest as reduced visual acuity and squinting of the eyes. The degree of vision loss varies greatly depending on the nature of the astigmatism, the refractive index and the direction of the axis. Astigmatism that falls within the physiological range, such as astigmatism of less than 50 degrees, usually has no effect on near and far vision. With high astigmatism, there is a significant loss of visual acuity due to combined amblyopia or other abnormalities, and it is difficult to obtain good corrected vision. This type of amblyopia develops in young children because during visual development, objects on the retina are always blurred, and the visual center of the brain receives this blurred stimulation for a long time, resulting in amblyopia over time. Once parents find that their child has doctor symptoms, do not ignore them and take the child to a regular hospital to avoid delaying treatment.