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In Reply The criterion standard for measurement of intraocular pressure is GAT. Dr Huang and colleagues state that general physicians should be cautious when using a commonly accepted threshold intraocular pressure of 22 mm Hg if measurements were not performed using GAT. All studies in our meta-analysis used GAT under rigorous conditions. The results of our meta-analysis showed that intraocular pressure measured with GAT is not a useful single screening tool for glaucoma even when measured under study conditions.
Hollands H, Johnson D, Jinapriya D. Diagnosis of Primary Open-Angle Glaucoma—Reply. JAMA. 2013;310(10):1074-1075. doi:10.1001/jama.2013.246456