Astigmatism of 75 degrees in three-year-old children is generally not serious and can be temporarily observed without special treatment measures when it does not affect normal vision. Astigmatism is a refractive error, the cause of which is related to genetics, disease, trauma, extraocular muscle tone and other factors. The main symptoms of astigmatism are blurred vision, decreased visual acuity, and visual fatigue. General 75 astigmatism is a mild astigmatism, usually does not affect vision, will not affect the physical health of the child, can be temporarily observed, if there is no discomfort symptoms, no need to take special treatment. If the child has abnormal vision or strabismus, he/she needs to go to the hospital and undergo dilated optometry to measure the exact amount of astigmatism, and choose the right amount of glasses under the doctor’s guidance to correct his/her vision. When a three-year-old child has 75 degrees of astigmatism, parents need to take the child to a regular hospital for examination and take relevant treatment measures with the doctor if necessary.