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.
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.