Some of you might be interested in the results of my recent ophthalmology exam.
They said my eyes were healthy, which is reassuring, but the reason I had it was to see how bad my visual field defect was, and if it would prevent me from driving.
The results were as I expected - testing of each eye alone showed a pretty complete loss of vision for the lower right visual field (also known as a lower right quadrantanopia). This test was pretty demoralising. I had to put my chin on a chin-rest and fix my gaze on a central light in a white array, where white lights of varying brightness and size would flash. My job was to press a button whenever I saw a light. There was a small sound before every light that I saw, and also before lots of lights that I didn't see. I resisted the temptation to press the button anyway, because I knew these machines keep track of false positive responses. After testing the individual eyes, they got me to do it again with both eyes, which was more encouraging. The results showed that I could see reasonably well in the periphery of the lower right quadrant with binocular vision, and that there was only a small area of loss in the centre. The ophthalmologist said that this should continue to improve over a number of years, and that the current results would not prevent me from driving, though I will need to do an OT driving exam first. He recommended repeating the assessment in 4 to 6 months, and doing the driving exam after that. The OT driving assessment involves a brief cognitive screen, driving simulation tests, and if I pass, an on-road assessment with a driving instructor in a dual-control vehicle.
I've become used to the field loss - I don't get the scintillating scotoma as much as I used to, and the field loss is like an itch in my eye, particularly my right one, as if something is missing. This doesn't make sense to me while I write it, but I suppose that not being able to see things reliably in that area manifests as a sense of something being missing, unless I move my eyes from side to side, or move my head. It doesn't affect me dramatically in daily life. I have a tendency to bump into things in that area, or knock over small things on benches, but this happens rarely, and I don't like the kids standing behind me and to the right when I'm sitting down. It doesn't bother me when they stand to my left, but standing on the right gives me the sense that someone is creeping up behind me.
I used to find it more comfortable to read things on the small screen of my iPhone, as I could keep the text in the left visual field, but I've become more comfortable with larger screens over recent months. I used to also feel more comfortable watching TV or movies with my head tilted to the right, so that everything was in the left visual field, but I don't need to do that anymore.