April 2010
Volume 51, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2010
Intra-Stromal Corneal Ring Segment and Posterior Chamber Phakic Intraocular Lens Implantation for Keratoconus Correction
Author Affiliations & Notes
  • L. Fernandez-Vega
    Fundación de Investigación Oftalmologica & Instituto Oftalmológico Fernández-Vega, Oviedo, Spain
    Surgery, University of Oviedo, Oviedo, Spain
  • J. Alfonso
    Fundación de Investigación Oftalmologica & Instituto Oftalmológico Fernández-Vega, Oviedo, Spain
    Surgery, University of Oviedo, Oviedo, Spain
  • D. Madrid-Costa
    Optics and Optometry, Universidad Europea de Madrid, Madrid, Spain
  • R. Montés-Micó
    Optics, University of Valencia, Spain, Valencia, Spain
  • A. Poo-López
    Fundación de Investigación Oftalmologica & Instituto Oftalmológico Fernández-Vega, Oviedo, Spain
  • J. Merayo-Lloves
    Fundación de Investigación Oftalmologica & Instituto Oftalmológico Fernández-Vega, Oviedo, Spain
  • Footnotes
    Commercial Relationships  L. Fernandez-Vega, None; J. Alfonso, None; D. Madrid-Costa, None; R. Montés-Micó, None; A. Poo-López, None; J. Merayo-Lloves, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science April 2010, Vol.51, 3475. doi:https://doi.org/
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      L. Fernandez-Vega, J. Alfonso, D. Madrid-Costa, R. Montés-Micó, A. Poo-López, J. Merayo-Lloves; Intra-Stromal Corneal Ring Segment and Posterior Chamber Phakic Intraocular Lens Implantation for Keratoconus Correction. Invest. Ophthalmol. Vis. Sci. 2010;51(13):3475. doi: https://doi.org/.

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

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Abstract

Purpose: : Outcome analysis the efficacy, safety and predictability of sequential PMMA Ferrara Ring-sements (Ferrara ring, Boecillo, Spain and Keraring, Belo Horizonte, Brasil) and posterior chamber intraocular Collamer lens (ICL) implantation for keratoconus correction.

Methods: : Charts form 18 eyes of 14 keratocunus patients who had sequential implantation of the PMMA Ring-sements and an ICL were evaluated. ICL implantation was performed 6 months after PMMA Ring-sements implantation. Uncorrected distance visual acuity (UCVA), best corrected distance visual acuity (BCVA), uncorrected distance near visual acuity (UCNVA), best distance-corrected near visual acuity (BCNVA) and residual refractive errors analyzed using vector analysis were recorded at 6 months post- PMMA Ring-sements implantation and 6 months after ICL implantation.

Results: : The mean UCVA (Snellen decimal) changed from 0.1 ± 0.05 before surgery to 0.2 ± 0.11 six months after PMMA Ring-sements implantation (P= 0.01) and to 0.6 ± 0.19 six months after ICL implantation (P< 0.0001). The BCVA changed from 0.7 ± 0.19 before surgery to 0.8 ± 0.20 six months after PMMA Ring-sements implantation (P= 0.002) and to 0.8 ± 0.14 six months after ICL implantation (P= 0.0007). The efficacy and safety indexes at 6 months of ICL implantation were 0.93 and 1.22, respectively. 78.95% of eyes were within ±1.00 diopters (D) and 47.37 % were within ±0.50 D of the desired refraction. The mean spherical equivalent after ICL implantation was - 0.651 ± 0.810D.

Conclusions: : Sequential Ferrara intracorneal ring-sements and ICL implantation was safe, effective and predictable for keratoconus correction.

Keywords: keratoconus • refractive surgery: phakic IOL 
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