
While high IOP has been a standard marker for diagnosing primary open-angle glaucoma, it is not foolproof. Patients with high IOP do not necessarily progress to glaucoma, while some patients with low or normal pressures do develop the disease. To improve the accuracy of diagnosis and better estimate progression, clinicians need to take into account other information, such as IOP fluctuation, visual field analysis with new technology, and data obtained with the latest imaging devices.