The university adds: “If these “highways” are blocked by cholesterol plaques, blood doesn’t reach the tissue it was heading for, and thus oxygen doesn’t, either.
“This results in a quick (within hours) and irreversible loss of function, which could include blindness of the affected eye depending on the location of the blockage/occlusion.”
Although this type of plaque could be pointing to the underlying culprit – high cholesterol – the most reliable way of finding your levels remains getting a blood test.
Your doctor may either take blood from your arm or do a finger-prick test, the NHS details.