Official ESCRS | European Society of Cataract & Refractive Surgeons
Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Evaluation of a new algorithm to account for posterior corneal astigmatism in toric IOL power calculations

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Session Details

Session Title: Pseudophakic IOLs: Toric I

Session Date/Time: Saturday 10/09/2016 | 16:00-18:00

Paper Time: 16:06

Venue: Hall C2

First Author: : A.Alarcon THE NETHERLANDS

Co Author(s): :    C. Canovas   S. Kasthurirangan   J. Ma   D. Koch   P. Piers        

Abstract Details


The purpose of this study is to evaluate retrospectively the effect of considering posterior corneal astigmatism (PCA) in toric intraocular lens (IOL) power calculations.


AMO Groningen, The Netherlands


PCA was incorporated in the calculations of the predicted post-operative refraction by a new algorithm. Residual cylinder with and without the incorporation of PCA was calculated by vector differences between predicted and actual post-operative refraction in 206 eyes implanted with non-toric IOLs (pre-operative astigmatism between 0.16 and 1.82D) and 46 eyes implanted with toric IOLs (pre-operative astigmatism between 0.59 and 2.35D).


Residual cylinder was reduced from 0.43 to 0.16D in non-toric eyes and from 0.35 to 0.16D in toric eyes when PCA was considered. On average, the number of patients with residual cylinder within 0.50 and 0.75D increased 10% when PCA was used to estimate the toric IOL power.


A retrospective evaluation of toric IOL power calculations showed that the new algorithm designed to account for PCA reduced the residual cylinder of the prediction. The implementation of this new algorithm to incorporate PCA may improve the refractive outcomes when toric IOLs are implanted in pseudophakic eyes.

Financial Disclosure:

... is employed by a for-profit company with an interest in the subject of the presentation, ... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, ... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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