Many ophthalmologists aren't equipped to look at the optic nerve. I had my eyes checked three times at different ophthalmologists and not one of them mentioned anything about my optic nerve or did a picture and scan of my optic nerve. The fourth one had a special mention that was able to take images of the nerve. That's how I found out my left optic nerve is thinning. My vision and eyes are perfect other than that. No pressure, other sign of disease, don't even need a prescription. Only reasoni kept seeing eye doctors is because I keep getting blurry Vision and sometimes a hole in my vision I left eye. Point is not all Drs have the same equipment.