Astigmatism in the eye is due to the different refractive power of the eye on different meridians, and the inability of parallel light to form a focus after passing through the refractive system of the eye. In general, mild astigmatism does not require special treatment. For more severe astigmatism, treatment can be achieved by means of correction. Most astigmatism is congenital, meaning that if a parent has astigmatism, the chances of the child having astigmatism are significantly higher. The minority of astigmatism is acquired, which is caused by improper eye use, environmental irritation, traumatic factors, etc. If the patient has normal vision, no visual fatigue, eye pain and other symptoms, only mild astigmatism exists and generally does not require correction. If the patient has more severe astigmatism, which is of medium height, easily causing amblyopia and blurred vision, or accompanied by eye pain, tearing, conjunctival congestion and other symptoms, relevant treatment is generally required. There are currently three treatments for astigmatism, one is the use of optical lenses, concave lenses for myopic astigmatism and convex lenses for hyperopic astigmatism. Another method is to correct astigmatism with toric contact lenses, which are generally used for irregular astigmatism, such as that caused by cone corneas. In addition, some patients may also consider surgical correction of astigmatism, mainly keratoconus surgery, intraocular refractive surgery, and IOL implantation.