…are very, very rare indeed. Let me try to explain this.
From a technical standpoint, my vision is 20/20. Why? Because I can read the little line on the chart.
However.
For a couple of years now, the letters (and just about everything else) have not had a crisp outline. It shows up most with things like letters, which have straight, solid lines. It all seems to be, for lack of a better word, furry.
I can’t say they have a “halo” because the fuzziness is the same color as the thing itself. I don’t see spots, I don’t have flashes; this is just a weird, weird thing. And when I’m tired, it gets worse – in the right eye only.
As you can imagine, this sometimes gives me some pretty bad headaches. It also means I have trouble focusing on things because my two eyes are giving me two very different readouts.
I’ve explained this to eye doctors in the past. The reaction has universally been, “well, you can read the bottom line, so you’re fine.”
Nooo, I’m not fine. Especially since my vision by evening is always worse than it is by morning.
Well, today there was a miracle. Eye exam; then dilation. And after dilation, my eyes did exactly the thing they do at night: the right one is suddenly far worse than the left.
I told the opthamologist… and… HE LISTENED. He listened to the point that he did the eye exam again, and he found something weird: my right eye had not just changed prescription entirely. It had somehow reversed itself (this isn’t quite right, but it’s like suddenly going from far-sighted to short-sighted).
He’s going to consult with the other docs in his office, and I’m returning tomorrow for more testing. THIS IS FABULOUS. I have hiiiiigh hopes.
I am also currently typing while wearing sunglasses. Darned dilation. 
