Open-angle

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It is the most common type. Your doctor may also call it wide-angle glaucoma. The drain structure in your eye -- it is called the trabecular meshwork -- looks normal, but fluid does not flow out like it should.

Closed Angle

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It is less common in the West than in Asia. You may also hear it called acute or chronic angle-closure or narrow-angle glaucoma. Your eye does not drain right because the drain space between your iris and cornea becomes too narrow. This can cause a sudden buildup of pressure in your eye. It is also linked to farsightedness and cataracts, a clouding of the lens inside your eye.

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