[Advances in the etiology and calculation of surgically induced astigmatism in cataract surgery].

After cataract extraction, surgically induced astigmatism (SIA) may occur due to the surgical incisions, especially when using clear corneal incisions, which may lead to different degrees of corneal astigmatism and affect postoperative visual quality. How to control SIA and improve the accuracy of SIA calculation is of great value to guide preoperative planning. In this article, the etiology and calculation methodologies of SIA in cataract surgery were reviewed, aiming to provide a reference for the clinical diagnosis and treatment of cataract refractive surgery.