This vision question is very intriguing to me. When I first developed symptoms of Lyme and was diagnosed instead with fibromyalgia (ugh -- something like 20 years ago, it seems), I kept telling my fibro. friends that it felt like whatever it is that is wrong with me is coming a whole lot from my eyes. My fibro. friends had very similar complaints.
Eye symptoms have dominated for me. Over the years I have watched my eyes go from vibrant looking to glazed over or dull. I have had LOTS of floaters for at least the last eight years that every eye specialist has blown off. I have pretty severe eye pain, blurry vision, swollen eyelids (told it was just allergies), extreme light sensitivity, vision that seems to change daily and get worse with brain fog, cloudiness, etc. I could go on and on.
Then, a couple of months ago, I got what I thought might be a type of Bell's palsy from Lyme. I had an extremely irritating twitch above my eyelid (right eye). It seemed like a facial or cranial nerve irritation. It lasted for several weeks. Saw an eye specialist who was supposed to know about Lyme. He blewn my symptoms off and the more I mentioned Lyme the less he engaged. Told me my eyes were dry. That's all. I got some GenTeal lubricating eye gel and used that. After about a week the twitching finally stopped, but I am not sure that the GenTeal was really what made it go away.
I have always had 20/20 vision, but in the last couple of years I have had to get reading glasses and they barely help. Everyone chalks it up to aging (I am 46). But I know there is more to it than that. The eyes are so much a part of Lyme and co-infections. Pamela Weintraub talks a lot about it in her book (I've been reading that recently).
I have late stage Lyme that was never acknowledged or treated, so I feel a bit screwed on all accounts! Sorry that I don't have any answers, but I can at least validate your symptoms, I hope? Oh, and I am pretty sure that I have taken the visual field test online a couple of times. No doctor needed. You just need a credit card to pay for it. It is actually available on the site of the guy who invented it, if we are talking about the same thing. I failed (slightly) both times I took it. I can look up the site if you are interested.