Correlation analysis between central corneal thickness and intraocular pressure in myoipia

Objective To measure central corneal thickness (CCT) and to investigate the relationship among CCT, refractive error, intraocular pressure (IOP) and corneal curvature in myopia. Methods The data of 219 patients(431 eyes) were measured with ultrasonic pachymeter, Goldmann tonometer, automatic refractor and corneal topography. Result 1. There is a significant positive correlation between CCT and lOP. An in- crease in CCT of 10 μ m is associated with an increase in IOP measurement of 0.5mmHg(1mmHg=0.133kPa). 2. There is a negative correlation between CCT and refractive error. 3. There are no relationship among CCT, corneal curvature, age and sex.Conclusion CCT is an important factor for the reading of IOP in myopia. Ex- amination of CCT is useful in evaluating IOP appropriately. CCT will become thicker and thicker as myopia diopter increases. Key words: Myopia; Intraocular pressure (IOP); Central corneal thickness (CCT) ; Corneal curvature