Blind spot (UPDATED)

UPDATE 12/3/11: I mentioned this blind spot to my friend Ed while visiting Augusta yesterday, and he said, “It’s not just the normal blind spot that everyone has? The one that’s caused by the optic nerve?” I quickly covered my left eye and tested my right, and lo and behold, the blind spot is there too. It’s not new. It’s not a symptom. It’s perfectly natural.

What a relief!

The original, outdated, panicked post is below.

I recently got new prescription eyeglasses. The change was long overdue. Days later, I’m still adjusting to the clarity and “3D HD” sensation I’m getting from being able to see properly again. I hadn’t realized just how much my eyesight had changed, or how much I was compensating for it.

With my vision now corrected properly, other problems with my sight can therefore be attributed to my pseudotumor cerebri, the intracranial pressure at the back of my eyes that has been threatening to blind me. I’d thought that the pseudotumor symptoms had receded for the most part, and maybe they had; maybe I’m truly not feeling as much pressure as before, and my field of vision certainly isn’t going completely white anymore. But yesterday I noticed something, something I’m not sure I would have spotted without my new clarity of sight.

A blind spot.

There is a place to the left of center on my left eye where things disappear. If I don’t cover my right eye, its peripheral vision compensates. If I do cover my right eye, then look at something with my left and slowly track my eye to the right, eventually the item in question will disappear into a blurry haze. As I continue moving my left eye to the right, the item will reappear in the periphery. In other words, there’s an area left of center on my left eye that isn’t seeing anything.

I first noticed it when I realized I should be seeing more of my computer monitor in the background while watching TV than I was. I covered my right eye and it vanished completely. I was then able to reproduce the issue with the blinking blue lights of our wireless router; it was as if they weren’t there at all. After that I made the tip of my pointer finger disappear.

I suppose a visual field test might have revealed this issue, but I haven’t had one in over a year. At my eye exam, I did have photos taken of the backs of my eyes, and those showed a blurriness that indicated the pressure there has not receded. My neurologist told me to continue taking the medicine he prescribed, diamox, which is technically glaucoma medicine and a diuretic, meant to hold the fluid at bay.

The neurologist is the one who told me in no uncertain terms that I had to lose weight in order to avoid losing my sight. Now I’m seeing the truth of that. I had weight loss surgery, and I’ve lost over 40 pounds so far, but that’s apparently not enough yet.

And now I’m scared. Will more blind spots form in the meantime? Will sight ever return to them, or are those spots dead forever?