Glaucoma is not one disease, but a group of diseases that can cause permanent blindness if left untreated. Just as there are different types of glaucoma, there are different treatments. Glaucoma robs people of their vision. It happens when fluid builds up in the eye, causing so much pressure that it kills cells in the optic nerve. Mary Hyman was diagnosed with glaucoma more than a decade ago. "It was something that came on, and I was not aware," said Hyman. Hyman knew ...
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