I agree, I have no idea how the eye issues/blindness can result from having any form of POTS. All I know is what my docs told me, and the many accounts of others claiming the same eye issues who have had POTS for years. There are sites out there where folks with POTS of all ages detail their symptoms, and eye issues seem common, especially during or directly after showering.I don't understand how that would explain anything, or help fix it , bc I have POTS and low blood volume and neuropathy , all diagnosed , and yet no doctor suggested that those things explained my eye symptoms and light sensitivity. I've not heard of that as an explanation for eye issues
But like you said, how and why? I certainly couldn't say. Maybe in this pursuit this winter I will get some answers describing the hows and whys... or maybe not.