Factors Associated with the Posterior Corneal Surface Elevation in Mmyopic Eye

ABSTRACT

PURPOSE: To know the factors associated with the posterior corneal surface elevation in myopic eye. METHODS: The posterior corneal surface elevation (PCSE), keratometry, central corneal thickness (CCT), peripheral corneal thickness (PCT), thinnest corneal thickness (TCT) were measured in 64 right myopic eyes with the Orbscan topography system. The correlation between PCSE and age, refractive error, intraocular pressure (IOP), keratometry, CCT, TCT, PCT, PCT-CCT, PCT/CCT, PCT-TCT, and PCT/TCT was evaluated. RESULTS: The posterior corneal surface elevation has correlation with CCT (r.0.3306, p0.0071), TCT ( r.0.4094, p0.0007), PCT-CCT(r0.3326, p0.0068), PCT/CCT (r0.3759, p0.0020), PCT-TCT (r 0.4750, p0.0001), and PCT/TCT (r0.5145, p0.0001) but does not have correlation with age, keratometry, refractive error, IOP (r.0.0627, p0.6225), and PCT. CONCLUSIONS: In myopic eyes, the posterior corneal surface elevation correlates with central corneal thickness and specifically the ratio PCT to TCT.