Thinning in the layers of the retina and retinal pigment epithelium around the optic nerve is called peripapillary atrophy. This can be a risk factor for glaucoma, and can also cause your blind spot to be larger than normal. Regular eye exams with fundus photos are recommended to monitor for any changes.
Peripapillary Atrophy
Los Alamos Family Eyecare, P.C. 