Dynamic contour tonometry for intraocular pressure measurement

PURPOSE: To compare dynamic contour tonometry as a new method for intraocular pressure measurement with Goldmann applanation tonometry. DESIGN: Clinical observational study. METHODS: The study included 176 eyes of 126 subjects (39 eyes with open-angle glaucoma, 137 normal eyes) and consisted of 528 dynamic contour measurements and 352 Goldmann tonometry measurements. Corneal pachymetry measurements were additionally performed. RESULTS: Mean dynamic contour tonometric measurements (18.71 +/- 5.90 mm Hg) were significantly (P <.001) higher than mean applanation tonometric values (16.98 +/- 5.86 mm Hg), correlating significantly with each other (r(2) =.905, P <.001). The slope of the regression line was 0.95. Correlation with central corneal thickness was significant for applanation tonometry (P =.036), while dynamic contour tonometry was statistically independent of corneal thickness (P =.32). CONCLUSIONS: For measurement of intraocular pressure, dynamic contour tonometry may offer a new technology, which, compared with applanation tonometry, may show a lower dependence on central corneal thickness.