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The natural courses of keratometric, pachymetric and visual acuity outcomes during 1 year follow-up after corneal collagen cross-linking

Poster Details

First Author: S.Rattan IRAQ

Co Author(s):    M. Muttasher              

Abstract Details


To show the sequences of changes in visual acuity and topographic outcomes during 1 year post corneal collagen cross-linking for patients with progressive Keratoconus.


Lasik specialty center/Baghdad/Iraq.


Corneal collagen cross-linking procedure was done for 45 eyes with progressive keratoconus.The following parameters had been monitored pre operatively,1, 3, 6 and 12 months postoperatively :K reading at apex of the cone( K apex),steepest simulated k reading(K2), corneal thickness at thinnest location, anterior and posterior elevation points, BCVA and UCVA. Placido –Scheimpflug topography (Sirius) device had been used to monitor the corneal parameters of the study. One –way ANOVA and Paired sample T test was used for statistical analysis.


At 1 year,an averages flattening of (2.11 D)diopter in K2 and (1.88 D) diopter in K apex were found. Mean BCVA improved by 1 line from (0.18) Log MAR to (0.13)Log MAR and mean UCVA improved by 3.5 lines from (0.89) to (0.64) log MAR.The corneal thickness at thinnest location was 5.71 Mm less than the baseline.All the above mentioned parameters showed a trend of worsening between the baseline and 1 month,and improvement thereafter. We found no statistically significant changes in the anterior elevation points while the posterior elevation point changed (increased) significantly.


Corneal collagen cross-linking seems to be effective in decreasing progression of keratoconus, with improvements in optical measures in many patients.Post operative parameters discussed within this review followed a seemingly reproducible trend in there natural course over 12 months .Generally, the trend that observed was immediate worsening between baseline and 1 month resolution at approximately 3 months, and improvement thereafter. FINANCIAL DISCLOUSRE: NONE

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