Generally speaking, if the astigmatism is not more than 75 degrees, no correction is necessary. If it is greater than 75 degrees, timely spectacle correction is needed. Regular astigmatism is clinically corrected by pillar lenses (frame glasses), but when the astigmatism is too large or irregular, frame lenses cannot obtain good correction or even cannot be corrected, and then contact lenses, especially specially designed contact lenses, can correct these abnormal astigmatism. Large corneal astigmatism also needs to be corrected with rigid highly permeable corneal contact lenses (RGP). A special rigid, gas permeable contact lens, worn at night while sleeping, is designed to temporarily alter the curvature of the cornea to gradually reduce myopia and improve naked eye vision through the principle of inverse geometry. Currently, spherical design corneal contact lenses are suitable for patients with simple myopia or myopia combined with cis-regular corneal astigmatism <1.50D; for patients with myopia combined with higher corneal astigmatism can use Toric inverse geometry design keratoplasty lenses or soft corneal lenses specifically designed to correct astigmatism, which can improve the poor contact between the lens and cornea due to corneal astigmatism while correcting the patient's astigmatism. In summary, mild ocular astigmatism can be corrected without correction if there are no symptoms (less than 75 degrees), and should be corrected with cylindrical lenses or with corneal contact lenses if there are symptoms. If you use contact lenses, you should change them regularly, review them periodically, and follow the instructions and instructions of the fitter strictly to wear and care for them.