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Cone surface measurement using Image J Software®: new evaluation method for keratoconus progression

Poster Details

First Author: A.Fadlallah LEBANON

Co Author(s):    E. Chelala              

Abstract Details


To assess the value of cornea surface measurement using Image J software in following keratoconus progression


Saint-Joseph University, Faculty of Medicine, Department of Ophthalmology


22 eyes of 19 patients with stage 2 Keratoconus and treated with Intracorneal ring segment (ICRS) were included in this study. Topography sagittal map before and after ICRS implantation were used to measure cone surface using Image J software ® (ImageJ 1.49v, National Institute of Health, USA). % Area index (percentage of the surface the cone occupies on the anterior curvature sagittal map) was used to compare for cone surface progression/regression.


% Area index was 42% and decreased to 30.2% after ICRS implantation. Best Corrected Visual Acuity (BCVA) increased from 0.27 to 0.58 decimal. Decrease in the % Area index was correlated to increased VA (p<0.05).


Cornea surface index (% Area index) may be a new tool to be integrated in Topographer machines to measure cone progression in keratoconus. FINANCIAL DISCLOUSRE: NONE

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