A Korean study reports dynamic contour tonometry used to measure intraocular pressure (IOP) in eyes with a history of laser refractive surgery may be a better indicator of glaucoma progression compared with Goldmann applanation or calculated by a correction formula.

The retrospective study included 98 eyes of 54 patients who had open-angle glaucoma and a history of laser refractive surgery. The investigation measured baseline, mean and peak IOP, IOP fluctuation and IOP reduction with each tonometry method. Researchers also analyzed corrected IOP parameters using central corneal thickness and mean keratometry values, in addition to comparing areas under the curve.

The study reported that the mean dynamic contour tonometry value, peak dynamic contour tonometry value and pattern standard deviation showed significant risk factors for progression. Additionally, researchers noted a significant difference in the predictive ability of the mean dynamic contour tonometry and Goldmann applanation values and the peak dynamic contour tonometry and Goldmann applanation values. The areas under the curve for corrected IOP did not exceed those of dynamic contour tonometry, the study noted.