London 2014 Registration Visa Letters Programme Satellite Meetings Glaucoma Day 2014 Exhibition Hotel Booking Virtual Exhibition Star Alliance
london escrs

Course handouts are now available
Click here

Come to London


WATCH to find out why

Site updates:

Programme Updates. Programme Overview and - Video Symposium on Challenging Cases now available.


Search Abstracts by author or title
(results will display both Free Papers & Poster)

Topographic changes after suture removal in keratoconus patients who underwent penetrating keratoplasty

Poster Details

First Author: D.Aydın TURKEY

Co Author(s):    B. Yüksel   U. Uzunel   T. Küsbeci        

Abstract Details


To investigate topographic changes after suture removal in keratoconus patients underwent penetrating keratoplasty.


İzmir Bozyaka Research and Education Hospital Department of Ophthalmology


This prospective study included 19 keratoconus patients underwent penetrating keratoplasty.Donor corneas were cut from the endothelial side with a disposable donor punch and sutured into the recipient bed with a 16-20 bite, single 10-0 nylon running suture. Sutures were removed after 1 year from surgery. Corneal topographic analysis was performed with Keratograph (Oculus, Wetzlar, Germany) just before and one month after suture removal. Flattest and steepest K values, magnitude and axis of the astigmatism, eccentricity, Q value, analyzed area and topographic patterns were recorded.


12 patients were male and 7 patients were female. Mean age was 38± 12.41 (18-66). Mean K increased from 41.94 ± 5.64 (31.05-49.20) to 45.44 ± 3.27 (41.20-55.20) D (p=0.029). Mean astigmatism increased from 4.53 to 5.77 D (p=0.13). Axis changed from 81.33 to 70.30 degree (p=0.47). Ecc value decreased from 0.50 to 0.13 (p=0.086). Mean Q value decreased from 11.79 to 11.71(p=0.43) Analyzed area increased from 37.68 to 44.89 % (p= 0.131). Prolate topographic patterns decreased from 36.84 % to 26.31 %, oblate patterns increased from 21.05 % to 42.10 % after suture removal.


An 3.5 increase in mean K value after suture removal following PK means a myopic shift in refraction. 1.23 D increase in astigmatism after suture removal may be expected. Topographic analysis can be acquired in a wider area. Overall oblate and ellipsoid geometry of the cornea, judged by the Q and eccentricity values, remains the same after suture removal. FINANCIAL INTEREST: NONE

Back to Poster listing