Glaucoma is often called “the thief of sight” because glaucoma symptoms either go undetected or develop slowly over time. Glaucoma usually starts by attacking the outside of your vision. Left untreated, glaucoma can lead to complete blindness in one or both eyes.
The most common eye problem linked to glaucoma is an increase in internal eye pressure. An increase in internal eye pressure doesn’t automatically mean you “have” glaucoma; only that you have a condition that could lead to it—that’s why a regular exam is so important.
Glaucoma typically affects your peripheral vision first. This is why it is such a sneaky disease: You can lose a great deal of your vision from glaucoma before you are aware anything is happening. If uncontrolled or left untreated, glaucoma can eventually lead to blindness.
Glaucoma is currently the second leading cause of blindness in the United States, with an estimated 2.5 million Americans being affected by the disease. Due to the aging of the U.S. population, it’s expected that more than 3 million Americans will have glaucoma by the year 2020.
Additional signs of glaucoma
Glaucoma is often referred to as the "silent thief of sight," because most types typically cause no pain and produce no symptoms. For this reason, glaucoma often progresses undetected until the optic nerve already has been irreversibly damaged, with varying degrees of permanent vision loss.
But there are other forms of the disease (specifically, acute angle-closure glaucoma), where symptoms of blurry vision, halos around lights, intense eye pain, nausea, and vomiting occur suddenly. If you have these symptoms, make sure you immediately see an eye care practitioner or visit the emergency room so steps can be taken to prevent permanent vision loss.
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