Cilioretinal Artery Occlusion - non central

81 year old female She noticed sudden vision loss in the right eye just before Christmas while watching television.  This was about one week ago.  She noticed when she closed her left eye and looked out of her right eye there was a darkness in the vision.  The left eye is OK.  She has no history of stroke and no neurological problems.  She had a few headaches recently but they went away.  
PMHx: HTN, Breast Cancer
Meds: HCTZ, Atorvastatin, Atenolol, Anastrozole
VA 20/80 OD, 20/32 OS

VA improved to 20/40 in one month in the involved eye