Ocular Response Analyzer® (ORA) G3 is the only device that measures Corneal Hysteresis (CH) and Corneal Compensated IOP (IOPcc). Corneal Hysteresis has consistently shown to be a more powerful predictor of, and strongly associated with, glaucoma progression, more so than key risk factors such as IOP and CCT. IOPcc is a pressure measurement that is less affected by corneal properties and more associated with glaucoma risk than Goldmann and other tonometers. Ocular Response Analyzer is engineered, designed, and assembled in USA.