Glaucoma is an umbrella term that refers to a group of eye conditions that are characterized by damage to the optic nerve. It's the most common cause of damage to the optic nerve, which can ultimately result in vision loss. In the majority of cases, fluid accumulates in the anterior portion of the eye. This additional fluid causes the eye to experience pressure, which gradually causes damage to the optic nerve. The term "eye pressure" refers to this pressure, which is also known as intraocular pressure (IOP).
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