Central corneal thickness and applanation tonometry.

摘要

The excellent work by Salvi et al. addresses the important issue of central corneal thickness (CCT) changes after phacoermulsification. They confirm that CCT increases in the immediate postoperative period.An earlier study by Kohlhass et al. concludes that a 1 nun Hg correction should be made in the measured intraocular pressure (IOP) for every 25 mum deviation from a CCT of 550 mum. Based on this formula, Salvi et al. suggest that the IOP is overestimated by approximately 3 mm Hg in the immediate postoperative period and by at least 1 mm Hg on the first day after phacoemulsification. Kohlhass et al. looked at corneas with different physiological thicknesses, while Salvi et al. studied eyes with corneal edema.