The Effect of the Changes in Central Corneal Thickness and Curvature on Measurement of Intraocular Pressure after LASIK

ABSTRACT

The measurement of intraocular pressure (IOP) is influenced by the parameters of corneal thickness, corneal curvature, and corneal astigmatism. LASIK changes these parameters and may influence measurements of IOP. IOPs of 62 eyes were analysed before LASIK and 6 months after LASIK and the correlation coefficient between IOP and corneal thickness & corneal curvature was determined. Preoperative and postoperative IOP after 6months follow-up was 13.03 +/- 3.26 mmHg, 9.26 +/-1.69 mmHg respectively. Postoperative IOP was significantly decreased as compared to preoperative one. There was a tendency that showed the low IOP was related to the decrease of corneal thickness & corneal curvature. Each correlation coefficient was r=0.563, r=0.646 respectively but the coefficient`s influence was not determinable. The decrease of corneal thickness and curvature showed a constant relation to the lowered IOP, therefore it should be taken in account in the patient evaluation.