There are no symptoms, and a person can lose up to 40 percent of vision without noticing. Once vision is lost, it's permanent. That's why ophthalmologists are urging people to get their eyes examined this month.
So far there is no cure for glaucoma, but medication or surgery can slow or prevent further vision loss. The right treatment depends upon the type of glaucoma, among other factors. Early detection is vital to stopping the progress of the disease.
Moral of the story? Get your eyes checked!