This doesn't happen to me every time I go low, but it did happen one time when i was waiting to pay in a Walmart or some other similar huge store. My vision just starting going blank on me! It was very scary but I knew it was a low because I had been low earlier and when I shop I often go low. My son had to finish the transaction as the glucose tabs started to work to bring my vision back. This is very scary and I am glad it doesn't happen all the time. It must be something about the lighting in Walmart. Julie |