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


escrs app advert yo advert

Refractive and topographic results after intracorneal ring segment exchange in the treatment of keratoconus

Search Title by author or title

Session Details

Session Title: Keratoconus and Phakic IOLs

Session Date/Time: Monday 12/09/2016 | 16:30-18:30

Paper Time: 17:24

Venue: Hall C4

First Author: : J.Ferreira Mendes PORTUGAL

Co Author(s): :    T. Monteiro   N. Franqueira   F. Faria-Correia              

Abstract Details


To evaluate the refractive and topographic results of patients with keratoconus, previously treated with intracorneal ring segments (ICRS) (Intacs SK® or Ferrara®) and unimproved visual acuity, which were submitted to exchange or explant.


Department of Ophthalmology, Hospital de Braga, Portugal


Retrospective study of patients who underwent one of the following: explantation of 6,00mm optical zone Intacs SK®-ICRS, and consecutive replacement for a Ferrara®-type; explantation of a single Ferrara®-type ICRS, in a previously treated with double ICRS; explantation of Ferrara®-type ICRS and consecutive replacement for a Ferrara®-type with different characteristics. Inclusion criteria were no improvement of best corrected visual acuity after first surgery, no progression of ectasia after surgery and a minimum follow-up of 12 months. Parameters evaluated were: uncorrected (UDVA) and best corrected (BCVA) visual acuity spherical and cylindrical refractions, topographic parameters, asphericity and aberrometry.


We included 25 eyes from 25 patients; 9 eyes had Intacs SK exchanged to Ferrara-type ICRS, 14 eyes (with 2 Ferrara type ICRS implanted) had 1 segment explanted and 2 eyes had Ferrara type ICRS exchanged for a different Ferrara segment combination. Six months after ICRS exchange, UDVA improved from 0,10±0,11 to 0,23±0,19 (p=0,10); BCVA improved from 0,35±0,21 to 0,77±0,22 (p<0,01); refractive cylinder reduced from -3,84±1,74 diopters (D) to -2,47±1,78 (p<0,05); mean K1 (p<0,01), K2 (p<0,01) and Kmax (p>0,05) increased; vertical coma improved from -2,11±1,67 to -1,46±1,88 (p<0,01). There was one case of ICRS extrusion due to superficial tunnel.


ICRS for keratoconus have been described as a safe and effective surgical treatment. The ability to describe the phenotype of the ectasia previous to surgery allows a more precise nomogram of implantation. The surgical technique of ICRS exchange / explant proved to be a safe and effective option if the surgeon has the possibility to describe the phenotype of the ectasia before the first ICRS implantation.

Financial Disclosure:


Back to previous