When your insurance lacks vision care it's not unusual to skip regular eye exams but, if you're over 40,--please think twice. Glaucoma, a leading cause of blindness, is diagnosed in and prevented through routine eye exams. Outside of an exam, early warning symptoms are generally unnoticeable. Estimates suggest that 2.7 million Americans have glaucoma but only half realize it! Do you know if you have glaucoma?