I went to get my eyes checked at Walmarts eye center because I can't see far away and after prescribing me glasses the lady that looked inside my eye said my optic nerve is bigger than most people's. She told me it could be swelling or I could of just been born like that but she doesn't know because she's not a doctor. My pressure test and flashing light test results were good I'm just extremely near sighted but glasses fixes it. Is a slightly bigger optic nerve a cause for concern?