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The decision to treat a patient with OHT in a preventive manner requires an assessment of risk, both the risk of developing glaucoma and also the risk of any glaucoma leading to debilitative sight loss in their lifetime. The Ocular Hypertension Study (OHTS) and the European Glaucoma Prevention Study (EGPS) clearly indicate that, at least when IOP is measured with GAT, measurement of CCT is an important and necessary element to the first part of this risk assessment.2,3 It is therefore appropriate that the recent NICE guidance on the diagnosis and management of chronic open-angle glaucoma and ocular hypertension demands that pachymetry is used in conjunction with GAT by suitably qualified clinicians to direct the management offered to patients with OHT.4
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