Niger J Clin Pract
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The aetiology of primary open-angle glaucoma is still uncertain. However certain factors are known or suspected of having an aetiologic role. ⋯ Others are diabetes, which is prone to selection bias, myopia, a history of typical migraine headaches, thinner central corneal thickness and the ability to taste phenylthiourea. If a particular patient is identified as having one or more of these risk factors, that patient is by definition, at greater risk of developing glaucoma than a patient who does not.