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Five year outcomes of intracorneal ring segments for the treatment of keratoconus: stability analysis

Poster Details

First Author: A.Vega Estrada SPAIN

Co Author(s):    J. Alio   N. Burguera   R. Fernandez Buenaga        

Abstract Details


To report long-term refractive and optical quality outcomes of patients implanted with intracorneal ring segment (ICRS) for the treatment of keratoconus as well to analyze the results according to the age of the patients.


Vissum Corporaci├│n Oftalmol├│gica. Alicante, Spain.


Retrospective, consecutive clinical study of 51 keratoconic eyes of 35 patients treated with ICRS (age range 15-56 years) were included. Uncorrected distance visual acuity (UDVA), best corrected distance visual acuity (CDVA), manifest refraction, corneal topographic and aberrometric analysis were evaluated preoperatively and postoperatively during a follow-up period of five years in all cases.


Significantly improvement of UDVA, CDVA, spherical equivalent and mean keratometry were found after 6 months (p<0.05). Five years after the surgical procedure these parameters remained unchanged (p= 0.31). A slight regression of 0.97 D was observed in the mean keratometry (KM) between 6 months and 5 years. However, this regression was not statistically sgnificant (p=0.39). Anterior corneal aberrometric outcomes decreased but the changes were not statistically significant (p?0.10). Linear regression analysis model showed that there was no correlation between the age of the patients and the changes observed in KM throughout the follow up period (p>0.05) (r2=0.001).


ICRS implantation in keratoconus patients provided long term improvement on the refractive and tographic status. There was no correlation between the amount of individual changes in the mean keratometric reading and patient age.

Financial Disclosure:


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