optic nerve | KERA News

optic nerve

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The World Health Organization lists glaucoma as the second leading cause of blindness in the world. It’s estimated more than two million Americans have the disease, but only half know it. No one’s certain exactly what causes the damage to the optic nerve that results in glaucoma, but in this edition of KERA's consumer health series, Vital Signs, Dr. Roger Velasquez, an opthalmologist with Parkland Hospital System in Dallas says there are certain risk factors to watch out for.