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Objective: To evaluate the correlation factors for the posterior corneal curvature after myopic LASIK.
Methods: The retrospective study of 92 eyes which underwent myopic LASIK was conducted. All LASIK procedures were done using HansatomeÂ® Microkeratome and TecnolasÂ® 217 excimer laser (B&L, USA). Pre- and post-operative data were collected including refraction, corneal thickness, anterior and posterior corneal curvature measured by OrbscanÂ® Corneal Topography. Statistical analysis was done to evaluate the posterior corneal curvature related to other factors.
Results: The posterior corneal curvature after myopic LASIK showed no correlation to anterior corneal curvature (R2 = 0.0036). It also showed low to moderate correlation to amount of myopia treated (R2 = 0.286) and corneal thickness (R2 = 0.37 for measured corneal thickness and R2 Â 0.40 for calculated corneal thickness which is calculated by subtract ablation depth from pre-operative thickness) (all p value < 0.05).
Conclusion: The posterior corneal curvature after myopic LASIK can be partially correlated with corneal thickness, anterior corneal curvature and amount of myopia treated.
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