Paying attention to the analysis and control of errors of Toric intraocular lens application

Toric intraocular lens (IOL) is a kind of hyperboloidal IOL and is used for the correction and treatment of cataract with corneal astigmatism by combining the astigmatism and spherical power.Topic IOL implantation has better stability and less impact on the ocular surface and provides better visual quality in comparison with other approaches for the patients with cataract and corneal astigmatism after surgery.However, based on the clinical experiences and the results of previous studies, a considerable number of eyes remain a certain amount of residual astigmatism following Toric IOL implantation, indicating some errors in Toric IOL implantation.Studies showed that Toric IOL implantation errors are the main causes of residual astigmatism and postoperative unsatisfactory refractive outcomes, including preoperative measurement error, the evaluation error for surgery-induced astigmatism (SIA), the imprecision of calculators for IOL power, and the refractive changes caused by IOL decentration, tilt and rotation after surgery.Ophthalmologists should fully understand, analyze and control the causes of these errors to improve the satisfaction of patients to Toirc IOL implantation.

Cataract/surgery; Astigmatism; Intraocular lens implantation; Prosthesis implantation; Intraocular lens, Toric