Between 89,000 and 120,000 people are blind from Glaucoma yearly. It is a leading cause of blindness, accounting for between nine and 12 percent of all cases of blindness. The rate of blindness from Glaucoma is between 93 and 126 per 100,000 population over 40. Between two million and three million Americans age 40 and over, or about one in every 30 people in that age group have Glaucoma. This includes at least one half of all those who have Glaucoma are unaware of it.