Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Results and effectiveness of keraring implantation for patients with stage III keratoconus

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Session Details

Session Title: Presented Poster Session: Refractive Corneal Inlays

Session Date/Time: Monday 12/09/2016 | 15:00-16:30

Paper Time: 15:30

Venue: Poster Village: Pod 2

First Author: : T.Shahinyan ARMENIA

Co Author(s): :                  

Abstract Details


Different methods of correction and treatment of keratoconus have their advantages and disadvantages. By crosslinking we only stop the progression of keratoconus, implantation of phakic intraocular lenses only has the effect of correction of vision; while in case of implantation of corneal segments both effects are achieved simultaneously - stabilization of the disease and improvement of vision acuity . The aim of this research is the analysis of the structural and functional indices of the patients’ eyes with stage III keratoconus, who have gone through manual implantation of corneal segments keraring.


“Shengavit” Medical Center, Yerevan, Armenia


69 eyes of patients with stage III keratoconus have undergone surgery. Before and after the surgery, the patients with keratoconus underwent complete specialized ophthalmological examination, in order to determine the stage and course of the disease: refractometry, keratometry, UCVA, BCVA, pachymetry, topography mapping of the cornea. All the patients were diagnosed to have stage III keratoconus. The age of the patients varied between 21 and 34. Progress of keratoconus before the surgery was revealed with 29 patients, and with the other 40 patients the disease didn’t progress.All patients were operated on by the same surgeon.


The results of the statistical analysis revealed that all the patients had improvement of all optical parameters of the cornea in a postsurgical period,( six months after the surgery). The results are given in the table. All patients had considerably increased radius of the corneal curvature.With simultaneous improvement of the vision acuity, keratoconus had a tendency to stop the progression among all the operated patients. Statistical analysis was conducted with usage of SPSS ANOVA. Eyes with keratoconus (n = 69) Radius of the corneal curvature Refractive strength of the cornea UCVA before surgery 6,9±0,09 49,28±0,7 0,15±0,02 after surgery 7,21±0,09 0,025>p>0,01 47,1±0,67 0,025>p>0,01 0,41±0,04 p<0,0005


The examined indices of the patients with stage III keratoconus before and after the surgery prove that the surgery (manual implantation of intrastromal corneal segments keraring), has significantly improved the vision acuity, due to increase of the radius of curvature and decrease of the refractive strength of the cornea. In the postsurgical period, during six months and longer, all the patients had stabilization in the process of keratoconus progress. It should be concluded that implantation of keraring corneal segments for patients with stage III keratoconus is a highly effective and low invasive method.

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