March 2012
Volume 53, Issue 14
Free
ARVO Annual Meeting Abstract  |   March 2012
Ferrara-type Intracorneal Ring Segments In Keratoconus With Coincident Topographic And Comatic Axis
Author Affiliations & Notes
  • Jesus Merayo-Lloves
    Ocular Surface, Ophthalmology,
    Fundacion de Investigacion Oftalmologica, Oviedo, Spain
  • Jose F. Alfonso
    Ocular Surface, Ophthalmology,
    Fndtn de Investig Oftalmologica, Oviedo, Spain
  • Carlos Lisa
    Cornea, Research,
    Fundacion de Investigacion Oftalmologica, Oviedo, Spain
  • Dagoberto Almanzar
    Cornea, Research,
    Fndtn de Investig Oftalmologica, Oviedo, Spain
  • Miguel Naveiras
    Cornea, Research,
    Fundacion de Investigacion Oftalmologica, Oviedo, Spain
  • Begona Baamonde
    Cornea, Research,
    Fundacion de Investigacion Oftalmologica, Oviedo, Spain
  • Footnotes
    Commercial Relationships  Jesus Merayo-Lloves, Ferrara ring (I); Jose F. Alfonso, None; Carlos Lisa, None; Dagoberto Almanzar, None; Miguel Naveiras, None; Begona Baamonde, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science March 2012, Vol.53, 4057. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Jesus Merayo-Lloves, Jose F. Alfonso, Carlos Lisa, Dagoberto Almanzar, Miguel Naveiras, Begona Baamonde; Ferrara-type Intracorneal Ring Segments In Keratoconus With Coincident Topographic And Comatic Axis. Invest. Ophthalmol. Vis. Sci. 2012;53(14):4057.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose: : To evaluate efficacy, predictability and safety of Ferrara Type intracorneal ring segment (ICRS) implantation for refractive corrections of paracentral keratoconus.

Methods: : Snellen uncorrected distance visual acuity (UDVA), best corrected visual acuity (CDVA) and residual refractive errors were recorded before and after 6 months post-Ferrara Type ICRS implantation after tunnel creation with femtosecond laser in 56 eyes of 49 patients with keratoconus. Power vector and Alpins method were used to analyze refractive outcomes after the surgery.

Results: : Mean UDVA was 0.17 + 0.14 before and 0.41 + 0.28 after surgery (P < 0.001). CDVA changed from 0.70 + 0.18 before to 0.80 + 0.17 after surgery (P < 0.0001). The efficacy index was 0.60. 5 of the eyes lost 1 lines of CDVA, 17 eyes had unchanged their CDVA, 15 eyes gained 1 line, 9 eyes gained 2 lines, 7 eyes gained 3 lines and 3 eyes gained 4 lines of CDVA. The safety index was 1.14. Spherical equivalent and astigmatism components were highly reduced after ICRS implantation (P < 0.01). Target and surgical induced astigmatism revealed that 78.6 % of eyes were + 1.00 D. No intraoperative and postoperative complications occurred in these eyes.

Conclusions: : ICRS implantation in paracentral keratoconus provided good visual and refractive outcomes, indicating that it is a predictable and safe procedure for refractive correction of this type of keratoconus.

Keywords: keratoconus • refractive surgery • refractive surgery: corneal topography 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×