Posters

The changes of posterior corneal curvature measured by Sirius topography in post-femtosecond LASIK patients

Poster Details

First Author: Q.Wang CHINA

Co Author(s):                        

Abstract Details

Purpose:

To investigated changes of posterior corneal curvature (ΔK ) in post Femtosecond LASIK patients using Sirius topography, and to analyse its relationship with ablation percentage,ablantion depth,residual bed thickness and equivalent power.

Setting:

Prospective, non-random case series.

Methods:

Seventy-three post Femtosecond LASIK patients (146 eyes; aged19~41 years, mean 23.7±5.1 years; equivalent power , -9.00~-3.00 D, mean-5.21±1.07D ) were recruited in this study.The posterior corneal curvature was measured by Sirius topography preoperatively and at one month post-surgery.The correlation between ΔK and ablation percentage,ablantion depth,residual bed thicknessand equivalent power were analyzed.

Results:

The posterior corneal curvature increased from -5.89±0.74D preoperatively to -7.01±0.81D at 1 month post-surgery. The ΔK was positively correlated with ablation percentage（r=0.213, P=0.025）and ablantion depth（r=0.197, P=0.032）.The ΔK was negatively correlated with equivalent power（r=-0.246, P=0.019） and residual bed thickness（r=-0.329, P=0.013）.

Conclusions:

The ΔK is related to ablation percentage, ablantion depth, equivalent power and residual bed thickness.

Financial Disclosure:

NONE