What is Glaucoma? Glaucoma is a group of eye conditions that damage the optic nerve, which is vital to good vision. Abnormal high pressure in the eyes is mostly the cause of this damage. Glaucoma can lead to blindness. Worldwide, glaucoma is the second-leading cause of blindness after cataracts. It occurs mostly in older adults, but can also occur in younger people. Glaucoma can be roughly divided into two main categories: "open-angle" and "closed-angle" glaucoma. Open-angle chronic glaucoma is painless, tends to develop slowly over time and often has no symptoms until the disease has progressed significantly. Closed angle glaucoma is usually chronic and also symptomless but can present all of a sudden as well. This involves sudden eye pain, blurred vision, mid-dilated pupil, redness, nausea and vomiting, resulting from a sudden spike in intraocular pressure from iridotrabecular contact. The nerve damage in glaucoma involves loss of retinal ganglion cells in a...
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