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Astigmatism management during cataract surgery using arcuate incisions or toric IOLs with femtosecond laser system utilizing iris registration based cyclotorsion correction

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Session Details

Session Title: Femtolaser-Assisted Cataract Surgery (FLACS) II

Session Date/Time: Monday 09/10/2017 | 08:30-10:30

Paper Time: 09:10

Venue: Room 4.4

First Author: : R.Weinstock USA

Co Author(s): :                        

Abstract Details


To study the astigmatism correction outcomes in patients with pre-existing astigmatism undergoing Femtosecond laser assisted cataract surgery with arcuate incisions (AIs) or toric intraocular lenses (IOLs), performed with femtosecond laser’s iris-registration based cyclotorsion correction.


The Eye Institute of West Florida, Largo, FL. USA.


The retrospective study included 50 eyes with cataract and pre-existing corneal astigmatism. All eyes underwent LACS with toric IOL implantation or Arcuate Incisions (AI) depending upon the amount of astigmatism. The eyes with preoperative astigmatism ranging from 0.25 to 1.29D received LACS AIs and 1.3 to 6.0D underwent toric IOL implantation with femto intrastromal marks. To compensate for the cyclorotation, preoperative topography with infrared imaging for iris-registration data was transmitted wirelessly to the femto laser and then matched to the laser’s intra-operative iris-registration to make AIs or place intrastromal marks at the correct axis to guide toric IOL implantations.


Main outcome measure is residual refractive astigmatism. Vector analyses will be presented. Magnitude of cyclorotation was also measured by comparing upright iris registration captured during preoperative testing with infrared topography and the iris landmarks obtained with femto laser iris registration in supine position. Data analysis is being performed. Preliminary results show substantial decrease in the refractive astigmatism. No intraoperative or postoperative complications were observed.


The combined use of infrared topography and femtosecond laser utilizing iris-registration based cyclotorsion correction is safe and effective for the creation of astigmatic incisions and guiding the alignment of toric IOLs. Iris registration technology allows for the compensation of cyclorotation improving the outcomes of both toric IOL and arcuate incisions. Additionally, wireless transmission of data from diagnostics to laser increases efficiency and removes potential sources of error from transcription or translation.

Financial Disclosure:

receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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