It is well known that forcing a sudden drop in chronically high average blood glucose (like, from 200+ to a normal ish range) with insulin can cause vision loss. I wonder if it's the same mechanism?
replyIt tends to happen when:
reply1) You must have a crowded optical disc as a precursor (low cup to disc ratio). Genetic and can be tested
2) You have stiff veins/arteries due to poor metabolic/cardio health
3) when blood pressure drops too much, blood flow can get cut off to the optical nerve temporarily due to reliance on high blood pressure due to 2
4) Due to loss of blood flow, optic nerve swells and closes blood flow into the eye due to 1
It's also true that having a crowded optical disc is pretty much a required precursor condition to suffering NAION.
replyWhich you can get checked for via a $50 optical scan.
No crowded disc, very little risk.
(Cup to Disc ratio of 0.2ish or less starts to present risk)