Eye stroke

I didn’t even know there was such a thing as “eye stroke”:



Unfortunately I am aware of what “eye stroke” is from first hand experience. I was not aware it could happen from looking at electronic devices. My understanding was it was caused by a blockage in the retinal artery from a small bit of plaque or similar that had got loose in the bloodstream. I am told by ophthalmologists there is a window of about four hours after the initial sudden loss of vision, wherein eyesight might possibly be restored. This is about how long the retina will function without blood supply. ( i.e. 000 and ask for lights and sirens)