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Three year patient satisfaction and complication rates following intrastromal corneal ring segment implantation for the treatment of corneal ectasia

Poster Details

First Author: R.Littlewood UK

Co Author(s):    R. Jones   M. Edwards   M. Raynor              

Abstract Details


Determine patients' satisfaction, dependency on refractive aids and complication rates following KeraRing (Mediphacos, Brazil) implantation for corneal ectasia in a University teaching hospital.


The Royal Hallamshire Hospital, Sheffield, UK


Retrospective review of patient case notes who received KeraRing implantation for corneal ectasia between July 2013 and Nov 2016. 78 patients received KeraRing insertion between these dates; case notes were available for 52 (66.7%) patients. Documented patient satisfaction and post-operative refractive aids reviewed following implantation. Electronic patient records were also reviewed for cases where paper notes were unavailable to ensure capture of all complications.


13.46% of patients manage with unaided vision, 25% wear soft contact lens (CL), 26.92% in glasses. No documented comment on visual aids in 34.62%. 67.31% of patients documented as happy or very happy with their outcome, satisfied for 17.31%. 8 (15.38%) documented as unhappy: - Two not able to tolerate Soft CL - One feels unchanged but chose to keep KeraRing - Five rings removed (Two melts in severe atopy patients, one melt and infection due to misuse of rigid CL and two because of no benefit)


Over the last three years 84.62% of patients receiving KeraRing implantation were satisfied with their surgery. Of these 67.31% were documented as happy or very happy with the outcome. Where data was available 13.46% of patients relied on no correction, 25% were wearing soft CL and 26.92% were in glasses. Small numbers of patients dissatisfied with KeraRing implantation, eight cases in 78 patients implanted (10.26%), five of these resulting in ring removal (6.41% of all cases).

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