Glaucoma is an eye disease characterised by a slow increase in fluid pressure inside the eye that causes damage to the optic disc (the eye‘s nerve centre). There are several different types of glaucoma.

Primary open-angle glaucoma refers to glaucoma that occurs because the eye’s open-angle drainage mechanism, which usually drains fluid from the eye and prevents the pressure increasing, does not function properly to drain the fluid. This type of glaucoma usually affects both eyes and begins slowly in adulthood. The signs and symptoms are not usually noticed until late in the disease, when significant optic disc damage and irreversible vision loss has occurred.

For more information, see Glaucoma.

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