When I have a low blood sugar at night, when I close my eyes I see a round ring of white light … like a fire ring. Do others see this? Anyone have any idea why this happens? When I wake up at night and see this I know I better get up and check my sugars. Usually I’ll find I am in the 40s when this happens, as it happened last night. The only other feeling I had was a sinking feeling … wasn’t sweating or shaking like sometimes I do with a low. Within a few minutes after eating something it disappears.