Research advances of Toric intraocular lens measurement and calculation

Authors: Gao Yi,  Li Zhaohui

DOI: 10.3760/cma.j.cn115989-20191127-00541
Published 2021-04-10
Cite asChin J Exp Ophthalmol, 2021, 39(4): 341-345.

Abstract                                                Read Full Text】 【Download PDF

The application of Toric intraocular lens (IOL) provides an opportunity for patients who want to remove cataract and correct astigmatism at the same time.In order to optimize the postoperative result and minimize the residual astigmatism, the accurate preoperative measurement and calculation of Toric IOL are crucial.To improve the accuracy, different astigmatism measurement devices with various advantages have been introduced into clinical practice one after another.Knowing the principle, advantages and disadvantages of the devices contributes to personalized selection of devices according to the patient’s condition.Manual keratometer is still the gold standard tool for measuring curvature, and corneal topography is used to assess whether the corneal astigmatism is regular.Most devices can provide reliable corneal data for Toric IOL calculation, and it is recommended that at least three different devices should be used to enhance the prediction accuracy preoperatively.The posterior corneal astigmatism, which has an effect on the measurement and calculation of Toric IOL, has been attracting more attention of ophthalmologists.With high accuracy and strong applicability, Barrett Toric Calculator is preferred in Toric IOL calculation.Moreover, various Toric calculators and formulas can give stable and accurate results after modification and optimization.In this article, the effects of various corneal curvature measurement devices, posterior corneal astigmatism and Toric calculator on Toric IOL measurement and calculation were reviewed.

Key words:

Toric intraocular lens; Astigmatism measurement device; Posterior corneal astigmatism; Toric calculator

Contributor Information

Gao Yi
Department of Ophthalmology, The First Medical Center of General Hospital of the People’s Liberation Army (PLAGH), Beijing 100853, China
Li Zhaohui
Department of Ophthalmology, The First Medical Center of General Hospital of the People’s Liberation Army (PLAGH), Beijing 100853, China
(Read 10 times, 1 visits today)
Updated: April 20, 2021 — 8:35 am