Posters

Visual, refractive and topographic outcomes of progressive thickness intrastromal corneal ring segments for the asymmetric bow-tie type of keratoconic eyes

Poster Details

First Author: E.Coskunseven TURKEY

Co Author(s):                        

Abstract Details

Purpose:

To evaluate pre and post operative visual, refractive and topographic outcomes of 28 Asymmetric Bow tie type  Keratoconic eyes  of 14 keratoconus patients who underwent with Progressive Thickness Intrastromal Corneal Ring Segments (ICRs) treatment.

Setting:

DUNYA EYE HOSPİTAL İSTANBUL TURKEY

Methods:

Unsatisfactory spectacle-corrected vision and contact lens-intolerant patients (≥18 years) with advanced asymmetric Bow tie  keratoconus (Grade I, II and III) underwent implantation with Progressive Thickness Intrastromal Corneal Ring Segments (Mediphacos Ltdza, Brazil). All patients underwent refractive assessment preoperatively and postoperatively, including measurement of uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), spherical equivalent (SE) and cylindrical refraction. Additionally, all corneal topographies of all patients were measured by Pentacam (Oculus, Germany) and topographic indices were evaluated.

Results:

In this retrospective case series, 28 eyes of 14 keratoconus patients were included. The mean age was 28 years. There were improvements postoperatively vs. preoperatively in mean UCVA (0.54±0.25 vs 0.24±0.21), mean BCVA (0.76±0,18 vs. 0.52±0,21), mean cylindrical refraction (-3.15±1.54 D vs -4,28±2,29 D), and mean SE (-3.10±2.25 vs -4.69±3.27 D). There was also a reduction in Kmean (44.95 postoperatively vs 47,76 preoperatively). Additionally, there were significant decrease on progression index values and Df, Db, Dp, Dt, Dy, D, ISC, IVA, KI, CKI, IHA, IHD, Rmin and TKC indices.

Conclusions:

The evaluation of visual performance and topographic measurements revealed that the implantation of the Progressive Thickness Intrastromal Corneal Ring Segments is an effective and a safe method for the the Asymmetric Bow tie type  Keratoconic Eyes

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a competing company