Thank you for posting your query at DoctorSpring.com.
I have noted your symptoms. The most likely possibility is migraine with visual aura. Sometimes, aura can occur without headaches too.
Other possibility is a partial seizure, arising from problems in visual cortex (occipital lobe)- this is less likely.
Finally, a remote possibility could be TIA- transient ischemic attack- due to reduced blood supply in the occipital lobe.
In any case, I would recommend doing an MRI scan of brain to exclude any pathology in the occipital lobe.
I hope it helps. Please get back if you have any follow up queries.
Dr. Sudhir Kumar MD (Medicine), DM (Neurology)
Senior Consultant Neurologis