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INTRASEG® ICRs combined with cross-linking for correction of high astigmatism after DALK

Poster Details

First Author: J.Grandin ARGENTINA

Co Author(s):    C. Gordillo   A. Lofti                 

Abstract Details


To evaluate the efficacy of femtosecond-assisted Intraseg intrastromal ring segment (ICRs) implantation combined with cross linkling in reducing high astigmatism in patients who have previously undergone deep anterior lamellar keratoplasty (DALK).


Surgeries were performed at Instituto Zaldivar de Mendoza, Argentina.


This retrospective, observational study included patients who had previously undergone DALK and after several controls of the surgery presented high residual astigmatism. Patients were implanted with Intraseg® ICRs (Gamma Vision, Argentina) using a femtosecond laser (IntraLase®) combined in the same procedure with cross linking. UDVA, CDVA, keratometrics, corneal thickness was measured preoperatively at 1, 3, 6, and 12 months postoperatively.


35 eyes of 28 patients (aged 42.24 ± 13.9 years) were analyzed. The mean time between corneal graft and ICRs surgery was 34 months. Mean UCVA (logMAR) changed from 1.22 ± 0.48 preoperatively to 0.19 ±0.14 postoperatively (p<0.001), and BCVA from 0.36 ± 0.19 to 0.11 ± 0.38 (p<.0001). Kmax decreased from 50.98 D preoperatively to 48.52 D (p<.0003) postoperatively, while Kmin changed from 42.91 D to 44.00 D. Mean cylinder decreased from -7.10 (range -3.50 to -10) to -4.2 (range -1 to -7). Mean pachymetry was 581± 51.6 (SD) preoperatively vs 592 ±45 (SD) postoperatively.


Intraseg ICRs implantation combined with cross linking an efficient and safe procedure for the treatment of high astigmatism after corneal graft, producing topographical changes, regularizing astigmatism, with a better spherical equivalent improving the CDVA.

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