Hi
Welcome to the MedHelp forum!
Occipital headaches—at the back of head, can be a part of migraines and temporary vision loss can be a symptom of this. It can also be due to high blood pressure, and pinched cervical spinal nerves in the upper neck. A more serious cause could be old injury causing suboccipital hemorrhage or bleeding.
Please consult your PCP for primary examination immediately followed by proper referral.
Take care!
Tell your doctor immediately! Anything with vision loss could be very severe, so it's better to have it checked out. If you don't have a family practitioner, find one today.