for the past 3 years i have been going to MD opthalmologist for eye exams,she is a glucoma expert,she always tells me that i have healthy eyes.I go there because my husband has glucoma.I have no history of this disease in my family.But yesterday i went to an optometrist and she told me my both optic discs are enlarged. last year i had feild vision test and it was perfect.Is it a sign of glucoma