Cuda said:
I had the identical vision problems about 10 times a few years ago, with the attendant partial blindness. In some cases the blindness was almost total. Tell me, the areas that were blank, were they just that, no darkness just a blinding white?
The third time this happened I was with a friend and we just happened to be driving past the local hospital, so I breezed in and had an emerg doctor look at me, as I was curious and slightly worried it might be a stroke. He told me it was a wicked pre-migraine aura and that I could expect to get a headache sometime during the day. You might be experiencing these and the objects in your head could be areas of local damage caused by inflammation triggered by an allergic reaction. The allergic cascade response type of migraine is often heralded by an intense aura, followed by milder headaches.
Did your blindness preceed your headaches? Are you also bothered by sinus problems?
Your agoraphobia could be the result of brain injury or allergy.
Can you think of any prosaic explanations for your scar and the area of redness on your temple? A wound from a spider will get larger and larger, necrotizing flesh and then shrink in size. Most people think that only "poisonous" spiders have this effect, but in truth, all spiders are poisonous.
I would resist the alien abduction explanation until I exhausted other possibilities.