the only tonometer capable of measuring Corneal Hysteresis, a superior predictor of glaucoma progression. The Ocular Response Analyzer G3 also provides the patented Corneal Compensated IOP (IOPcc) measurement, which is a better indication of the true pressure than Goldmann or other methods of tonometry. Corneal Hysteresis is an indication of the biomechanical properties of the cornea. This information is different from thickness or topography, which are geometrical attributes of the cornea.