April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
Intrastromal Corneal Rings Segments for the Treatment of Keratoconus
Author Affiliations & Notes
  • Erick Hernandez-Bogantes
    Clinica Oftalmologica, San Jose, Costa Rica
  • Franklin Rechnitzer
    Clinica Oftalmologica, San Jose, Costa Rica
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 4228. doi:
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      Erick Hernandez-Bogantes, Franklin Rechnitzer; Intrastromal Corneal Rings Segments for the Treatment of Keratoconus. Invest. Ophthalmol. Vis. Sci. 2014;55(13):4228.

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

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Abstract

Purpose: To report the visual, keratometric and safety outcomes of intrastromal corneal rings segments placed in patients diagnosed with keratoconus.

Methods: An observational, retrospective, longitudinal, uncontrolled study was conducted. Patients diagnosed with keratoconus that were treated with intrastromal rings between 2010 and 2012 with a minimum of 1 year follow up were included in the study. Uncorrected visual acuity, best corrected visual acuity, spherical equivalent, keratometry, pachymetry, degree of incision, depth of the segments, follow up and complications were assessed.

Results: A total of 197 eyes were included in the study with an average follow up of 23.82 ± 14.07 months. Overall, the uncorrected visual acuity and the best corrected visual acuity improved by 0.36 logMAR ± 0.47 (p= <0.001) and 0.16 logMAR ± 0.28 (p= <0.001) respectively. The spherical equivalent also improved with a mean of -2.03 ± 0.63 D (p= <0.001). Mean keratometric values decreased by 2.66 ± 3.62 D (p= <0.001). A total of 8 (4.06%) patients had surgical complications. The most common complication was extrusion of the segment.

Conclusions: Instraestromal corneal ring segments appear to improve visual acuity and corneal topography.

Keywords: 480 cornea: basic science  
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