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Aetiology

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The aetiology of chronic simple glaucoma is obscure. It may result from a senile sclerotic process of the smaller intra-ocular vessels, and secondarily of the ocular tissues. This may lead to a silting up of the aqueous outflow of the anterior chamber and consequent increase in intra-ocular pressure. Posteriorly this may cause ischaemic atrophy of the optic-nerve fibres which causes atrophic cupping of the disc and restriction of the visual fields.

Known risk factors include age greater than 40 years, a positive family history (increases risk of glaucoma by 10-fold, particularly in siblings), Afro-Caribbeans, diabetes, thyroid eye disease and myopia.


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