Astigmatism of 300 degrees in children is a very high degree of astigmatism, which can significantly affect the child’s vision and is usually irreversible, patients can wear glasses to correct astigmatism and improve vision. Wearing eyeglasses is the most common treatment to correct high astigmatism. Children need to have their pupils dilated and then have their eyes tested to get an accurate refractive error, and then the glasses can be fitted according to the results of the test to correct the astigmatism and improve the child’s vision. When children become adults, if the refractive error is stable and they do not want to wear glasses, refractive surgery can be used to correct astigmatism and improve vision, such as corneal laser surgery and intraocular lens implantation. Children with 300 degrees of astigmatism should draw the attention of parents. If they do not wear glasses in time to correct their astigmatism and improve their vision, they may develop amblyopia, which may seriously damage their vision. It is recommended that children with astigmatism consult a doctor in a timely manner to assess their condition and follow the doctor’s instructions for treatment.