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Glaucoma is characterized by optic nerve damage which results in vision loss, and elevated eye pressure (intraocular pressure) is the primary risk factor. There is growing evidence that other factors may predispose a person to glaucoma damage, including circulation to the eye and optic nerve.
That puts pressure on your optic nerve. If you donât treat it, you could lose your sight. Most of the time there are no early symptoms. But a type called acute angle-closure glaucoma causes pressure inside your eye to rise suddenly. Symptoms include severe eye pain, nausea and vomiting, headache, and worsening vision.