The treatment of astigmatism in 3 year olds with 200 diopters can be corrected with glasses to improve vision and avoid amblyopia. After the diagnosis of 200 diopters of astigmatism in 3-year-old children, corrective treatment should be taken in a timely manner, mainly through the use of astigmatism glasses. 3-year-old children are in the stage of growth and development, and should be intervened as early as possible for astigmatism. If astigmatism is not treated in a timely manner, it will affect the development of the child’s vision and may lead to the development of amblyopia. Large astigmatism can lead to decreased visual acuity and distorted vision, which can be corrected with glasses to improve vision. Surgical treatments such as corneal laser surgery and intraocular lens implantation are also available for children with astigmatism when they reach adulthood. It is recommended that children with astigmatism consult a doctor to evaluate their condition and follow the doctor’s instructions.