A 5-year-old child with 150 diopters of astigmatism cannot be treated, but good eye habits can help prevent astigmatism from increasing, and correcting astigmatism with prescription lenses can improve vision. Astigmatism is a type of refractive error, usually caused by developmental abnormalities or prolonged squinting that results in a difference in the vertical and horizontal curvature of the cornea, etc. 5-year-olds with astigmatism can be corrected with eyeglasses to improve vision, but there is no effective way of eliminating astigmatism at this time. In normal life, patients should pay attention to avoid squinting and other bad eye habits, try to control the growth of astigmatism. 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.