Welcome to Neurotalk:

I have to wonder about your diet... are you vegetarian?
Do you have Omega-3's in your diet? Flax oil, or fish?

Have you had your B12 measured? This losing vision...did you have an angiogram of your retina? Blood flow in the eye, is very sensitive to inflamed arteries. The temporal arteries can get inflamed and cause problems with the eye, and the sounds you hear in the ear. I had a stroke in my left eye about a decade ago and the eye doctor was very on top of that.

Low B12 will result in elevated homocysteine which can affect the small vessels in the eye before the other larger ones in the body. Homocysteine inflames the lining of the blood vessels and eventually causes heart attacks and strokes.

So I think you should have B12 tested, and tests for temporal arteritis. Are you lifting weights? If so I'd stop for now and see if things change. Lifting puts huge strains on blood vessels in the head.