What are the different forms of glaucoma?

 • Open-angle glaucoma, the most common form of the disease, has no symptoms at first. It is a progressive disease characterized by optic nerve damage. High eye pressure is the most significant recognized risk factor for the development and progression of the disease. The pressure in the eye builds up gradually. At some point, side vision (peripheral vision) is lost and without treatment, total blindness will occur. • Closed-angle glaucoma comes in two forms: chronic or acute. Acute closed-angle glaucoma is a medical emergency that must be treated immediately or blindness can result in one or two days. This happens when the normal flow of aqueous humor between the iris and the lens suddenly becomes blocked. Symptoms may include severe pain, nausea, vomiting, and blurred vision. When the patient looks at a light source they may also see colored halos around the lights. Chronic closed-angle glaucoma progresses slowly and can produce damage without symptoms, similar to open-angle glaucoma.

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