Astigmatism in 3 year old children is difficult to recover on its own, it is mainly related to the curvature of the cornea and the shape of the cornea, if the shape of the cornea is not very regular, it will produce astigmatism. 3 years old children’s cornea shape and curvature has basically completed development, after the age of 3 years old caused by astigmatism or existing astigmatism is difficult to recover, are more stable or timely change, the change in degrees will not be very large The change will be around 50-100 degrees. If astigmatism is found in a 3 year old child, the astigmatism should be actively examined and if the astigmatism is large, glasses should be worn for correction to avoid amblyopia. If the astigmatism is relatively small, for example, less than 100 degrees, it will have less impact on vision and can be observed first.